# Into Math Grade 1 Module 7 Lesson 4 Answer Key Represent Difference Unknown Problems with a Visual Model

We included HMH Into Math Grade 1 Answer Key PDF Module 7 Lesson 4 Represent Difference Unknown Problems with a Visual Model to make students experts in learning maths.

## HMH Into Math Grade 1 Module 7 Lesson 4 Answer Key Represent Difference Unknown Problems with a Visual Model

I Can use visual models and write equations to solve word problems that compare to find an unknown difference.

How can you show a way to solve 5 the problem?   Explanation:
At the animal park, there are 12 seals and 5 lions
The subtraction equation that solves the problem is 12 – 5 = 7
So, there are 7 more seals than lions.

Read the problem. At the animal park, there are 12 seals and 5 lions. How many more seals are there than lions? Have children use tools to solve the problem.

Build Understanding

In the classroom, there are 6 children and 13 books. How many fewer children are there than books? A. How can you draw to show the problem?  B. Use the bar model to show another way. C. Write an equation to solve.
____ fewer children Explanation:
In the classroom, there are 6 children and 13 books
The subtraction equation that solve the problem is 13 – 6 = 7
So, 7 fewer children are in the classroom.

Turn and Talk What helped you set up your bar model?

Step It Out

1. Ryan picks 8 roses. Lee picks 13 roses. How many more roses does Lee pick than Ryan?
A bar model can show the problem. A. Write the name to label each bar.
B. Write the number of roses each person picks.
C. Write an addition and a subtraction equation to represent the problem. Equation: ____
Equation: _____
Lee picks more ___ roses. Explanation:
Ryan picks 8 roses
Lee picks 13 roses
The subtraction equation that shows more number of roses Lee picks is
13 – 8 = 5
The addition equation to represent the problem is
8 + 5 = 13
Lee picks more 5 roses.

Step It Out

2. Tamara finds 5 pine cones. Marcy finds 11 pine cones. How many fewer pine cones does Tamara find than Marcy? A. Write the name to label each bar.
B. Write the number of pine cones each person has.
C. Write an equation to represent the problem.
Equation: ____
Tamara finds ____ fewer pine cones. Explanation:
Tamara finds 5 pine cones
Marcy finds 11 pine cones
The equation that represent the problem is
11 – 5 = 6
Tamara finds 6 fewer pine cones than Marcy.

Check Understanding Math Board

Complete the bar model. Write an equation.

Question 1.
There are 16 red cubes. There are 9 blue cubes. How many blue fewer blue cubes are there than red cubes? Equation: _____
There are ___ fewer blue cubes. Explanation:
There are 16 red cubes
There are 9 blue cubes
The subtraction equation that shows the fewer blue cubes is
16 – 9 = 7
So, there are 7 fewer blue cubes than red cubes.

Complete the bar model. Write an equation.

Question 2.
Sahil has 15 marbles. Theo has 6 marbles. How many more marbles does Sahil have than Theo? Equation: ____
Sahil has ___ more marbles. Explanation:
Sahil has 15 marbles.
Theo has 6 marbles
The subtraction equation that shows the more number of marbles Sahil has is
15 – 6 = 9
So, Sahil has 9 more marbles than Theo.

Question 3.
There are 14 cows. There are 6 chickens. How many fewer chickens are there than cows? Equation: ____
There are ____ fewer chickens. Explanation:
There are 14 cows
There are 6 chickens
The subtraction equation that shows the fewer chickens is
14 – 6 = 8
So, there are 8 fewer chickens.

Question 4.
Reason What two equations can you write to describe the bar model shown? Equation: ____
Equation: ____
The addition equation that describe the model is
5 + 7 = 12
The subtraction equation that describe the model is
12 – 5 = 7.

Model with Mathematics Complete the bar model to solve. Write an equation.

Question 5.
There are 15 red rubber bands. There are 8 blue rubber bands. How many fewer blue rubber bands are there than red? Equation: ____
There are ___ fewer blue rubber bands. Explanation:
There are 15 red rubber bands
There are 8 blue rubber bands
The subtraction equation that shows fewer blue bands is
15 – 8 = 7
So, there are 7 fewer blue rubber bands.

Question 6.
Rose makes 17 drawings. Conne makes 9 drawings. How many more drawings does Rose make than Conne? Equation: _____
Rose makes ___ more drawings. Explanation:
Rose makes 17 drawings
Conne makes 9 drawings
The subtraction equation that shows more number of drawings of rose is
17 – 9 = 6
Rose makes 6 more drawings.

I’m in a Learning Mindset!

Did using a visual model help me understand the problems?

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