We included **HMH Into Math Grade 2 Answer Key**** PDF** **Module 13 Lesson 3 Use Addition and a Number Line to Subtract** to make students experts in learning maths.

## HMH Into Math Grade 2 Module 13 Lesson 3 Answer Key Use Addition and a Number Line to Subtract

I Can use addition to find the difference between numbers on a number line.

**Step It Out**

1. There are 42 picture frames. 37 of the frames are shaped like rectangles. The rest of the frames are shaped like circles. How many frames are shaped like circles?

A. Model this problem with an equation.

___ – ___ = ___

B. Use the number line to find the difference. Start at 37. Count up to 42.

C. How many spaces did you count up in all?

___ spaces

D. Write the difference.

42 – 37 = ___

E. Solve.

There are __ frames shaped like circles.

Answer:

5 spaces

Explanation:

A. Model this problem with an equation.

42 – 37 = 5

B. Use the number line to find the difference. Start at 37. Count up to 42.

C. How many spaces did you count up in all?

5 spaces

D. Write the difference.

42 – 37 = 5

E. Solve.

There are 5 frames shaped like circles.

**Step It Out**

2. Linette collects 24 rocks. She paints 16 of them. How many rocks are not painted?

A. Model this problem with an equation.

_______________

B. Use the number line to find the difference.

C. 24 – 16 = ___

D. Solve. ___ rocks are not painted.

Answer:

8 rocks

Explanatsion:

A. Model this problem with an equation.

x + 16 = 24

24 – 16 = 8

B. Use the number line to find the difference.

C. 24 – 16 = 8

D. Solve. 8 rocks are not painted.

**Turn and Talk** How does a number line help you use addition to find the answer to a subtraction problem?

Answer:

Number line helps to perform small additions and subtractions visually.

Explanation:

Number line helps the students to understand the addition and subtraction easily at primary level.

**Check Understanding Math Board**

Question 1.

Todd has 54 beads. He uses 47 of the beads to make a necklace.. How many beads does Todd have left? Use the number line. Count up to find the difference.

Todd has ___ beads left.

Answer:

7 beads

Explanation:

Todd has 54 beads.

He uses 47 of the beads to make a necklace.

Number of beads Todd have left = 54 – 47 = 7

**On Your Own**

**Use Tools Use the number line. Count up to find the difference.**

Question 2.

Hugo plays with 22 puppets. He gives some of the puppets to Mary. Now Hugo has 14 puppets. How many puppets does Hugo give Mary?

Hugo gives ___ puppets to Mary.

Answer:

8 puppets

Explanation:

Hugo plays with 22 puppets.

He gives some of the puppets to Mary = 22 – x

Now Hugo has 14 puppets.

Number of puppets Hugo give Mary = 22 – 14 = 8

Question 3.

84 – 76 = ___

Answer: 8

Explanation:

Point the smaller number 76 and bigger number 84 on number line,

then count up to know the difference from the smallest number.

Question 4.

___ = 62 – 58

Answer:

4 = 62 – 58

Explanation:

Point the smaller number 58 and bigger number 62 on number line,

then count up to know the difference from the smallest number.

Question 5.

37 – 28 = ___

Answer:

37 – 28 = 9

Explanation:

Point the smaller number 37 and bigger number 28 on number line,

then count up to know the difference from the smallest number.

**On Your Own**

Question 6.

June has 55 beads. She uses 48 of them to make a necklace. How many beads does June have now? Use the number line. Count up to solve.

June has ___ beads now.

Answer:

7 beads

Explanation:

June has 55 beads.

She uses 48 of them to make a necklace.

Number of beads June have now 55 – 48 = 7

**Use Repeated Reasoning Use the number line. Count up to find the difference.**

Question 7.

___ = 32 – 24

Answer:

8 = 32 – 24

Explanation:

Point the smaller number 24 and bigger number 32 on number line,

then count up to know the difference from the smallest number.

Question 8.

61 – 56 = ___

Answer:

61 – 56 = 5

Explanation:

Point the smaller number 56 and bigger number 61 on number line,

then count up to know the difference from the smallest number.

Question 9.

45 – 38 = ___

Answer:

45 – 38 = 7

Explanation:

Point the smaller number 38 and bigger number 45 on number line,

then count up to know the difference from the smallest number.