We included HMH Into Math Grade 1 Answer Key PDF Module 6 Lesson 7 Solve Addition and Subtraction Problems to make students experts in learning maths.
HMH Into Math Grade 1 Module 6 Lesson 7 Answer Key Solve Addition and Subtraction Problems
I can choose ways to solve word problems to find unknown sums, differences, or addends.
Step It Out
1. Doug has 15 staplers. 8 are green, and the rest are pink. How many pink staplers does he have?
A. How can you show the problem?
THINK: I can use cubes to show a way to make 15.
B. Write an equation that solves the problem.
Equation: _________
C. There are ___ pink staplers.
Answer:
8 + 7 = 15
There are 7 pink staplers
Explanation:
Doug has 15 staplers
8 are green, and the rest are pink
The subtraction equation that help to solve the problem is
15 + 8 = 7
The addition equation that matches with the problem is
8 + 7 = 15
So, there are 7 pink staplers.
Step It Out
2. Lia has some animal books. She gives 9 books to Max. Now she has 5 books. How many books did Lia start with?
A. How can you use a concrete model to show the problem?
THINK: I can draw counters.
B. Write a subtraction equation that matches the problem.
Equation: ___
C. Write an addition equation that solves the problem.
Equation: ___
D. Lia had ___ books to start.
Answer:
Explanation:
I used bar model to solve
The subtraction equation that matches the problem is
14 – 9 = 5
The addition equation that solves the problem is
9 + 5 = 14
Lia had 14 books to start.
Turn and Talk Does your answer make sense? Explain.
Step It Out
3. Penny puts 11 dog toys in two baskets. How many toys can she put in each basket?
A. How can you use a visual model to show the problem?
THINK: I can use a bar model.
B. How many toys could Penny put in each basket?
__ toys in basket 1 __ toys in basket 2
C. Write an equation that proves your answer is correct.
Equation: _________
Answer:
Explanation:
There could be 5 toys in 1 basket and 6 toys in the other
The equation that proves my answer is
5 + 6 = 11
There are 11 toys in all
Penny can put 5 toys in basket 1, 6 toys in basket 2.
Check Understanding Math Board
Use a bar model and write an equation to solve.
Question 1.
Jose sees 12 bees. Some fly away. Now there are 3 bees. How many bees fly away?
Equation: _____
____ bees fly away.
Answer:
Explanation:
Jose sees 12 bees. Some fly away
Now there are 3 bees
The subtraction equation that solve the problem is
12 – 3 = 9
Therefore, 9 bees flew away.
On Your Own
Use a bar model and write an equation to solve.
Question 2.
Model with Mathematics There are 15 guinea pigs. 9 eat lettuce. The rest eat carrots. How many guinea pigs eat carrots?
Equation: ___
___ guinea pigs eat carrots.
Answer:
Explanation:
There are 15 guinea pigs. 9 eat lettuce
The rest eat carrots
The subtraction equation that solve the problem is
15 – 9 = 6
Therefore, 6 guinea pigs ate carrots.
Question 3.
Open Ended Cindy sees 13 butterflies. Some are orange and some are blue. How many butterflies could be orange, and how many could be blue?
___ orange butterflies
___ blue butterflies
Answer:
Explanation:
Cindy sees 13 butterflies. Some are orange and some are blue
There could be 8 orange butterflies and 5 blue butterflies
The addition equation is 8 + 5 = 13
Therefore, there are 8 orange butterflies and 5 blue butterflies.
Write an equation to solve.
Question 4.
Reason Jack has some stamps. He gives 8 stamps to Ricardo. Now Jack has 9 stamps. How many stamps did Jack have to start? Draw to show your thinking.
Equation: ___
___ stamps
Answer:
Explanation:
Jack has some stamps
He gives 8 stamps to Ricardo
Now Jack has 9 stamps
The addition equation that solves the problem is
8 + 9 = 17
There are 17 stamps.
Question 5.
Model with Mathematics Alicia has 13 toy boats. She gives some to Lara. Now she has 9. How many toy boats does she give to Lara?
Equation: ___
___ toy boats
Answer:
Explanation:
Alicia has 13 toy boats
She gives some to Lara
Now she has 9
The subtraction equation that help to solve the problem is
13 – 9 = 4
Alicia gave 4 toy boats to Lara.
Add or Subtract.
Question 6.
6 + 10 = ___
Answer:
6 + 10 = 16
Explanation:
The sum of 6 and 10 is 16
So, 6 + 10 = 16.
Question 7.
12 – ___ = 4
Answer:
12 – 8 = 4
Explanation:
The subtraction equation to solve the problem is
12 – 4 = 8
The difference of 12 and 8 is 4
So, 12 – 8 = 4.
Question 8.
13 – 9 = ___
Answer:
13 – 9 = 4
Explanation:
The difference of 13 and 9 is 4
So, 13 – 9 = 4.
Question 9.
13 = 5 + ___
Answer:
13 = 5 + 8
Explanation:
The subtraction equation to solve the problem is
13 – 5 = 8
The sum of 5 and 8 is 13
So, 5 + 8 = 13.
Question 10.
14 = 7 + ___
Answer:
14 = 7 + 7
Explanation:
The subtraction equation to solve the problem is
14 – 7 = 7
The sum of 7 and 7 is 14
So, 14 = 7 + 7.
Question 11.
11 = 6 + ___
Answer:
11 – 6 = 5
Explanation:
The subtraction equation to solve the problem is
11 – 6 = 5
The sum of 6 and 5 is 11
So, 11 – 6 = 5.
On Your Own
Model with Mathematics Write an equation to solve.
Question 12.
There are 14 children riding bikes. Some children go home. Now there are 5 children riding bikes. How many children go home?
Equation: ____
___ children go home.
Write to explain your thinking.
Answer:
14 – 9 = 5
9 children go home.
Explanation:
There are 14 children riding bikes
Some children go home
Now there are 5 children riding bikes
The subtraction equation that help to solve the problem is
14 – 5 = 9
Therefore, 9 children went home.
Model with Mathematics Write an equation to solve. Draw to show your thinking.
Question 13.
Gia gives 7 grapes to Trish. Now Gia has 9 grapes. How many grapes did Gia start with?
Equation: ______ ___ grapes
Answer:
Explanation:
Gia gives 7 grapes to Trish
Now Gia has 9 grapes
The addition equation that solves the problem is
7 + 9 = 16
There are 16 grapes with Gia to start with.