## Engage NY Eureka Math 1st Grade Module 3 Lesson 9 Answer Key

### Eureka Math Grade 1 Module 3 Lesson 9 Sprint Answer Key

A

Write the missing number.

Question 1.

17 + 1 = ☐

Answer:

18

Explanation:

To add the numbers, add first the one’s place digit. (7+1=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 2.

15 + 1 = ☐

Answer:

16

Explanation:

To add the numbers, add first the one’s place digit. (5+1=6). Now bring down one from ten’s place digit. Hence the answer is 16.

Question 3.

18 + 1 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (8+1=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 4.

15 + 2 = ☐

Answer:

17

Explanation:

To add the numbers, add first the one’s place digit. (5+2=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 5.

17 + 2 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (7+2=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 6.

18 + 2 = ☐

Answer:

20

Explanation:

To add the numbers, add first the one’s place digit. (8+2=0). Now bring down one from ten’s place digit. Hence the answer is 20.

Question 7.

15 + 3 = ☐

Answer:

18

Explanation:

To add the numbers, add first the one’s place digit. (5+3=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 8.

5 + 13 = ☐

Answer:

18

Explanation:

To add the numbers, add first the one’s place digit. (5+3=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 9.

15 + 2 = ☐

Answer:

17

Explanation:

To add the numbers, add first the one’s place digit. (5+2=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 10.

5 + 12 = ☐

Answer:

17

Explanation:

To add the numbers, add first the one’s place digit. (5+2=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 11.

12 + 4 = ☐

Answer:

16

Explanation:

To add the numbers, add first the one’s place digit. (2+4=6). Now bring down one from ten’s place digit. Hence the answer is 16.

Question 12.

13 + 4 = ☐

Answer:

17

Explanation:

To add the numbers, add first the one’s place digit. (3+4=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 13.

3 + 14 = ☐

Answer:

17

Explanation:

To add the numbers, add first the one’s place digit. (3+4=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 14.

17 + 2 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (7+2=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 15.

12 + 7 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (2+7=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 16.

11 + 9 = ☐

Answer:

20

Explanation:

To add the numbers, add first the one’s place digit. (1+9=10). Now bring down one from ten’s place digit. Hence the answer is 20.

Question 17.

10 + 9 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (0+9=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 18.

9 + 9 = ☐

Answer:

18

Explanation:

To add the numbers, add first the one’s place digit. (4+1=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 19.

7 + 9 = ☐

Answer:

16

Explanation:

To add the numbers, add first the one’s place digit. (7+9=16). Now bring down one from ten’s place digit. Hence the answer is 16.

Question 20.

8 + 8 = ☐

Answer:

16

Explanation:

To add the numbers, add first the one’s place digit. (8+8=16). Now bring down carry forward one from ten’s place digit. Hence the answer is 18.

Question 21.

7 + 8 = ☐

Answer:

15

Explanation:

To add the numbers, add first the one’s place digit. (7+8=15). Now bring down carry forward one from ten’s place digit. Hence the answer is 18.

Question 22.

8 + 5 = ☐

Answer:

13

Explanation:

To add the numbers, add first the one’s place digit. (8+5=13). Now bring down the carry forward one from ten’s place digit. Hence the answer is 13.

Question 23.

11 + 8 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (1+8=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 24.

12 + ☐ = 17

Answer:

12+x=17

x=17-12

x=5

Explanation:

First of all, move variable 12 to the right side and subtract it from 17. So the solution we get is 5.

Question 25.

14 + ☐ = 17

Answer:

14+x=17

x=17-14

x=3

Explanation:

First, move the variable 14 to the right side and subtract it from 17. So the solution we get is 3.

Question 26.

8 + ☐ = 17

Answer:

8+x=17

x=17-8

x=9

Explanation:

First, move the variable 8 to the right side and subtract it from17. So the solution we get is 9.

Question 27.

☐ + 7 = 16

Answer:

x+7=16

x=16-7

x=9

Explanation:

First move the variable 7 to the left side and subtract it from 16. So the solution we get is 9.

Question 28.

☐ + 7 = 15

Answer:

8 + 7 =15

Explanation:

x+7=15

x=15-7

x=8. Hence the answer is 8

Question 29.

9 + 5 = 10 + ☐

Answer:

9+5 = 10+x

14 = 10+x

14-10 =x

x=4

Explanation:

First, rearrange the terms as 9+ 5=14. Now move the variable 10 to the left side and subtract it from 14. So the solution we get is 4

Question 30.

7 + 8 = ☐ + 9

Answer:

7+8 = 6+9

Explanation:

First, rearrange the terms as 7+ 8=15. Now move the variable 9 to the left side and subtract it from 15. So the solution we get is 6

15 = x+9

15-9 = x

x=6

B

Write the missing number.

Question 1.

14 + 1 = ☐

Answer:

15

Explanation:

To add the numbers, add first the one’s place digit. (4+1=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 2.

16 + 1 = ☐

Answer:

17

Explanation:

To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 3.

17 + 1 = ☐

Answer:

18

Explanation:

To add the numbers, add first the one’s place digit. (7+1=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 4.

11 + 2 = ☐

Answer:

13

Explanation:

To add the numbers, add first the one’s place digit. (1+1=2). Now bring down one from ten’s place digit. Hence the answer is 13.

Question 5.

15 + 2 = ☐

Answer:

17

To add the numbers, add first the one’s place digit. (5+2=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 6.

17 + 2 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (7+2=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 7.

15 + 4 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 8.

4 + 15 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 9.

15 + 3 = ☐

Answer:

18

To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 10.

5 + 13 = ☐

Answer:

18

To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 11.

13 + 4 = ☐

Answer:

17

To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 12.

14 + 4 = ☐

Answer:

18

To add the numbers, add first the one’s place digit. (6+1=7). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 13.

4 + 14 = ☐

Answer:

18

Explanation:

To add the numbers, add first the one’s place digit. (4+4=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 14.

16 + 3 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (6+3=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 15.

13 + 6 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (3+6=9). Now bring down one from ten’s place digit. Hence the answer is 17.

Question 16.

11 + 9 = ☐

Answer:

20

Explanation:

To add the numbers, add first the one’s place digit. (1+9=0). Now add the carry forward 1+1 = 2 and bring down 2 from ten’s place digit. Hence the answer is 20

Question 17.

10 + 9 = ☐

Answer:

19

Explanation:

To add the numbers, add first the one’s place digit. (0+9=9). Now bring down one from ten’s place digit. Hence the answer is 19.

Question 18.

8 + 9 = ☐

Answer:

17

Explanation:

Add both the numbers 8+9 =17. Now bring down one from ten’s place digit. Hence the answer is 17.

Question 19.

9 + 9 = ☐

Answer:

18

Explanation:

Add both the numbers 9+9 =18. Now bring down one from ten’s place digit. Hence the answer is 18.

Question 20.

9 + 8 = ☐

Answer:

17

Explanation:

Add both the numbers 9+8 =17. Now bring down one from ten’s place digit. Hence the answer is 17.

Question 21.

8 + 8 = ☐

Answer:

16

Explanation:

To add the numbers, add first the one’s place digit. (8+8=16). Now bring down one from ten’s place digit. Hence the answer is 16.

Question 22.

8 + 5 = ☐

Answer:

13

Explanation:

To add the numbers, add first the one’s place digit. (8+5=13). Now bring down one from ten’s place digit. Hence the answer is 13.

Question 23.

11 + 7 = ☐

Answer:

18

Explanation:

To add the numbers, add first the one’s place digit. (1+7=8). Now bring down one from ten’s place digit. Hence the answer is 18.

Question 24.

12 + ☐ = 18

Answer:

12 + 6 = 18

Explanation:

To add the numbers, add first the one’s place digit. (2+6=8). Now bring down one from ten’s place digit. Hence the answer is 18.

12+x =18

x =18-12

x=6

Question 25.

14 + ☐ = 18

Answer:

14 + 4 = 18

Explanation:

First, rearrange the terms as 14+x=18. Now move variable 14 to the right side and subtract it from 18. So the solution we get is 4.

14+x=18

x = 18-14

x = 4

Question 26.

8 + ☐ = 18

Answer:

8 + 10 = 18

Explanation:

First, rearrange the terms as 8 + x=18. Now move the variable 8 to the right side and subtract it from 18. So the solution we get is 10.

8 + x =18

x = 18-8

x = 10

Question 27.

☐ + 5 = 14

Answer:

9 + 5 = 14

Explanation:

First, rearrange the terms as x+5=14. Now move variable 5 to the right side and subtract it from 14. So the solution we get is 9.

x+5 =14

x =14 -5

x = 9

Question 28.

☐ + 6 = 15

Answer:

9 + 6 = 15

x + 6 =15

x =15-6

x = 9

First, rearrange the terms as x+6=15. Now move the variable 6 to the right side and subtract it from 15. So the solution we get is 9.

Question 29.

9 + 6 = 10 + ☐

Answer:

9 + 6 = 10 + 5

Explanation:

Now, rearrange the terms as 9+5=10+x. Now add 9+5 i.e 14 and move variable 14 to the left side and subtract it from 10. The solution we get is 4.

9+6 = 10 + x

15 = 10+x

15-10 = x

x = 5

Question 30.

6 + 7 = ☐ + 9

Answer:

6+7 = 4+9

Explanation:

Now, rearrange the terms as 6+7= x+9. Now add 6+7 i.e 13 and move variable 13 to the left side and subtract it from 9. The solution we get is 4.

### Eureka Math Grade 1 Module 3 Lesson 9 Problem Set Answer Key

Question 1.

Look at the picture below. How much longer is Guitar A than Guitar B?

Guitar A is ______ unit(s) longer than GuitarB.

Answer:

Guitar A is 1 unit(s) longer than GuitarB.

Explanation:

To measure the guitar length we have to use any object like a paper clip or a toothpick. By using that we can know the length of the guitar A i.e 4 units and Guitar B is 3 units in length. By observing their lengths carefully we would know that Guitar A is 1 unit longer than GuitarB.

Question 2.

Measure each object with centimeter cubes.

The blue pen is _____ __________________.

The yellow pen is _____ __________________.

Answer:

The blue pen is 8 cm.

The yellow pen is 10 cm.

Explanation:

Here we have to measure both the objects in centimeter cubes. After measuring, the blue pen is 8 cm in length and the yellow pen is 10 cm in length.

Question 3.

How much longer is the yellow pen than the blue pen?

The yellow pen is _________ centimeters longer than the blue pen.

Answer:

The yellow pen is 2 centimeters longer than the blue pen.

Explanation:

We have already measured the lengths of each object in centimeter cubes. Therefore the yellow pen is 10 cm long in length and that the blue pen is 8 cm long. Hence by comparing both the length of the objects we could know that the yellow pen is 2 centimeters longer than the blue pen.

Question 4.

How much shorter is the blue pen than the yellow pen?

The blue pen is _________ centimeters shorter than the yellow pen.

Answer:

The blue pen is 2 centimeters shorter than the yellow pen.

Explanation:

As we know the blue pen is 8 cm long and the yellow pen is 10 cm long. By comparing both the object values we could know that the blue pen is 2 cm shorter than the yellow pen i.e is 10-8 = 2 cm.

Use your centimeter cubes to model each problem. Then, solve by drawing a picture of your model and writing a number sentence and a statement.

Question 5.

Austin wants to make a train that is 13 centimeter cubes long. If his train is already 9 centimeter cubes long, how many more cubes does he need?

Answer:

Here Austin needs 4 more cubes.

Explanation:

Check the below picture for a better understanding.

9 +_ =13

9 + x =13

x=13-9

x=4

Question 6.

Kea’s boat is 12 centimeters long, and Megan’s boat is 8 centimeters long. How much shorter is Megan’s boat than Kea’s boat?

Answer:

Megan’s boat is 4 cm shorter than Kea’s boat.

Explanation:

8+x=12

x=12-8

x=4

Megan’s boat is 4 centimeter’s shorter than Kea’s.

Question 7.

Kim cuts a piece of ribbon for her mom that is 14 centimeters long. Her mom says the ribbon is 8 centimeters too long. How long should the ribbon be?

Answer:

The ribbon should be 6 cm long.

Explanation:

14-8=6

The ribbon should be 6 cm long in length.

Question 8.

The tail of Lee’s dog is 15 centimeters long. If the tail of Kit’s dog is 9 centimeters long, how much longer is the tail of Lee’s dog than the tail of Kit’s dog?

Answer:

The tail of lee’s dog is 6 cm longer than the tail of kit’s dog.

Explanation:

For a better explanation, we have drawn a picture of the tail which is 15 cm and 9 cm long. Therefore by subtracting 9 from 15 we could get that the tail of lee’s dogs is 6 cm longer than the tail of kit’s dog.

9+x=15

x=15-9

x=6

### Eureka Math Grade 1 Module 3 Lesson 9 Exit Ticket Answer Key

Use your centimeter cubes to model the problem. Then, draw a picture of your model.

Mona’s hair grew 7 centimeters. Claire’s hair grew 15 centimeters. How much less did Mona’s hair grow than Claire’s hair?

Answer:

Mona’s hair is 8 cm shorter than claire’s hair.

Explanation:

15 – 7 = 8 cm. Hence mona’s hair is 8 cm less than claire’s hair.

### Eureka Math Grade 1 Module 3 Lesson 9 Homework Answer Key

Question 1.

Look at the picture below. How much shorter is Trophy A than Trophy B?

Trophy A is _________ units shorter than Trophy B.

Answer:

1 unit.

Explanation:

By observing the objects carefully in the given question Trophy A is 1 unit shorter than trophy B.

Question 2.

Measure each object with centimeter cubes.

The red shovel is _________ _________________________

The green shovel is ________ ________________________

Answer:

The red shovel is 6 cm cubes.

The green shovel is 8 cm cubes.

Explanation:

By measuring each of the objects with centimeter cubes we got the values of red and green shovel as 6 cm and 8 cm.

Question 3.

How much longer is the green shovel than the red shovel?

The green shovel is _________ centimeters longer than the red shovel.

Answer:

The green shovel is 2 centimeters longer than the red shovel.

Explanation:

As we know the values of both objects by just comparing them with one another we could know the green shovel is 2 cm longer than the red shovel.

Use your centimeter cubes to model each problem. Then, solve by drawing a picture of your model and writing a number sentence and a statement.

Question 4.

Susan grew 15 centimeters, and Tyler grew 11 centimeters. How much more did Susan grow than Tyler?

Answer:

Susan grew 4 cm more than Tyler.

Explanation:

15 – 11 = 4. Hence Susan grew 4 cm more than Tyler.

Question 5.

Bob’s straw is 13 centimeters long. If Tom’s straw is 6 centimeters long, how much shorter is Tom’s straw than Bob’s straw?

Answer:

Tom’s straw is 7 cm shorter than Bob’s straw.

Explanation:

13 – 6 = 7. Hence Tom’s straw is 7 cm shorter than Bob’s straw.

Question 6.

A purple card is 8 centimeters long. A red card is 12 centimeters long. How much longer is the red card than the purple card?

Answer:

The red card is 4 cm longer.

Explanation:

12 – 8 = 4 cm. Hence the red card is 4 cm longer than the purple card.

Question 7.

Carl’s bean plant grew to be 9 centimeters tall. Dan’s bean plant grew to be 14 centimeters tall. How much taller is Dan’s plant than Carl’s plant?

Answer:

Dan’s plant is 5 cm taller.

Explanation:

14 – 9 =5 cm . Hence Dan’s plant is 5 cm longer than carl’s plant.