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## Bridges in Mathematics Grade 1 Home Connections Answer Key Unit 2 Module 3

**Bridges in Mathematics Grade 1 Home Connections Unit 2 Module 3 Session 2 Answer Key**

**Dots, Apples & Shapes**

Question 1.

Draw the dots on the right side of each card to make 10. Then write a fact family to match.

ex

a.

Answer:

Explanation:

Number of given dots = 7.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 7

= 3.

Equations:

3 + 7 = 10.

7 + 3 = 10.

10 – 7 = 3.

10 – 3 = 7.

b.

Answer:

Explanation:

Number of given dots = 1.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 1

= 9.

Equations:

1 + 9 = 10.

9 + 1 = 10.

10 – 1 = 9.

10 – 9 = 1.

c.

Answer:

Explanation:

Number of given dots = 8.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 8

= 2.

8 + 2 = 10.

2 + 8 = 10.

10 – 2 = 8.

10 – 8 = 2.

d.

Answer:

Explanation:

Number of given dots = 10.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 10

= 0.

10 + 0 = 10.

0 + 10 = 10.

10 – 0 = 10.

Question 2.

Fill in the missing numbers.

9 + = 10Â Â Â Â Â Â + 1 = 10Â Â Â Â Â Â 4 + 6 = Â Â Â Â Â Â Â Â Â Â Â Â Â Â 10 + = 10

10 – 6 = Â Â Â Â Â Â Â 10 – 7 = Â Â Â Â Â Â 10 – 1 = Â Â Â Â Â Â Â Â Â Â Â Â Â Â 10 – 8 =

10 – = 6Â Â Â Â Â Â Â – 1 = 9Â Â Â Â Â Â Â 10 – 4 = Â Â Â Â Â Â Â Â Â Â Â Â Â 10 – = 8

Answer:

Explanation:

Missing numbers:

9 + ?? = 10.

=> ?? = 10 – 9

=> ?? = 1.

?? + 1 = 10.

=> ?? = 10 – 1

=> ?? = 9.

4 + 6 = 10.

10 + ?? = 10.

=> ?? = 10 – 10

=> ?? = 0.

10 – 6 = 4.

10 – 7 = 3.

10 – 1 = 9.

10 – 8 = 2.

10 – ?? = 6.

=> ?? = 10 – 6

=> ?? = 4.

?? – 1 = 9.

=> ?? = 9 + 1

=> ?? = 10.

10 – 4 = 6.

10 – ?? = 8.

=> ?? = 10 = 8

=> ?? = 2.

Question 3.

There were 3 apples on the table. Jan put 6 more apples on the table. How many apples were on the table in all? Show your work.

There were ______ apples on the table in all.

Answer:

Number of apples all on the table = 9.

There were 9 apples on the table in all.

Explanation:

Number of apples on the table = 3.

Number of more apples Jan puts on the table = 6.

Number of apples all on the table = Number of apples on the table + Number of more apples Jan puts on the table

= 3 + 6

= 9.

Question 4.

**CHALLENGE** Make a picture that is worth 14âŠ„. You can use as many as you like of these shapes. Label your picture. Prove that it is worth 14âŠ„.

Answer:

Explanation:

Total amount a picture that is worth = 14âŠ„.

Value of a square = 5âŠ„.

Value of a circle = 2âŠ„.

Value of a triangle = 1âŠ„.

Equations of value 14âŠ„ by shapes:

14 = 5 + 5 + 2 + 2

14 = 5 + 5 + 1 + 1 + 2

14 = 5 + 2 + 2 + 2 + 2 + 1

14 = 5 + 2 + 2 + 2 + 1 + 1 + 1

**Bridges in Mathematics Grade 1 Home Connections Unit 2 Module 3 Session 5 Answer Key**

**Dots & Dollars**

Question 1.

Draw the dots on the right side of each card to make 9. Then write a fact family to match.

ex

a.

Answer:

Explanation:

Number of given dots = 5.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 5

= 5.

=> Equations:

5 + 5 = 10.

10 – 5 = 5.

b.

Answer:

Explanation:

Number of given dots = 3.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 3

= 7.

=> Equations:

3 + 7 = 10.

7 + 3 = 10.

10 – 7 = 3.

10 – 3 = 7.

c.

Answer:

Explanation:

Number of given dots = 8.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 8

= 2.

=> Equations:

8 + 2 = 10.

2 + 8 = 10.

10 – 2 = 8.

10 – 8 = 2.

d.

Answer:

Explanation:

Number of given dots = 4.

Total number of dots to make = 10

Number of more dots needed = Total number of dots to make – Number of given dots

= 10 – 4

= 6.

=> Equations:

4 + 6 = 10.

6 + 4 = 10.

10 – 6 = 4.

10 – 4 = 6.

Question 2.

Fill in the missing numbers

9 + = 9Â Â Â + 7 = 9Â Â Â Â Â 6 + 3 = Â Â Â Â 9 + = 10

9 – 3 = Â Â Â 9 – 6 = Â Â Â Â Â Â Â 9 – 4 = Â Â Â Â 9 – 5 =

9 – = 0Â Â Â – 2 = 7Â Â Â Â Â Â Â Â 9 – 8 = Â Â Â Â 9 – = 5

Answer:

Explanation:

9 + ?? = 9.

=> ?? = 9 – 9

=> ?? = 0.

?? + 7 = 9.

=> ?? = 9 – 7

=> ?? = 2.

6 + 3 = 9.

9 + ?? = 10.

=> ?? = 10 – 9

=> ?? = 1.

9 – 3 = 6.

9 – 6 = 3.

9 – 4 = 5.

9 – 5 = 4.

9 – ?? = 0.

?? = 9 – 0

=> ?? = 9.

?? – 2 = 7.

=> ?? = 7Â 2

=> ?? = 5.

9 – 8 = 1.

9 – ?? = 5.

=> ?? = 9 – 5

=> ?? = 4.

Question 3.

Marco has 6 dollars. How many more dollars does he need to have 10 dollars in all? Show your work.

Marco needs ____ dollars to have 10 dollars in all.

Answer:

Number of dollars he needs to have 10 dollars = 4.

Marco needs 4 dollars to have 10 dollars in all.

Explanation:

Number of dollars Marco has = 6.

Total number of dollars = 10.

Number of dollars he needs to have 10 dollars = Total number of dollars – Number of dollars Marco has

= 10 – 6

= 4.

Question 4.

**CHALLENGE** Katy and her two friends have 5 dollars each. They want to buy a game that costs 18 dollars. How much more money do they need? Show your work.

Katy and her friends need ____ more dollars to have 18 dollars in all.

Answer:

Number of dollars they need more to buy game =3.

Katy and her friends need 3 more dollars to have 18 dollars in all.

Explanation:

Number of people = 3.

Number of dollars each have = 5.

Cost of the game they want to buy = 18 dollars.

Total number of dollars they have = Number of people Ã— Number of dollars each have

= 3 Ã— 5

= 15.

Number of dollars they need more to buy game = Cost of the game they want to buy – Total number of dollars they have

= 18 – 15

= 3.