We included **HMH Into Math Grade 1 Answer Key PDF** **Module 13 Lesson 4 Solve Two-Digit Addition and Subtraction Problems **to make students experts in learning maths.

## HMH Into Math Grade 1 Module 13 Lesson 4 Answer Key Solve Two-Digit Addition and Subtraction Problems

I Can choose strategies to solve two-digit addition and subtraction problems.

**Step It Out**

Question 1.

A farmer has 90 pumpkins. She sells 40 pumpkins. How many pumpkins are left?

A. Explain how to solve the problem.

Answer:

I will counting on to subtract

B. Draw and write to solve.

THINK: I can add to subtract.

4 tens + _________ tens = 9 tens

So, 9 tens – 4 tens = ___________ tens.

90 – 40 = __________

Answer:

I can add to subtract

I am at 4, I need 5 tens more to get 9 tens

4 tens + 5 tens = 9 tens

So, 9 tens – 4 tens = 5 tens

90 – 40 = 50.

C. There are _________ pumpkins left.

Answer:

There are 50 pumpkins left.

Question 2.

Laney has 64 red tulips. She gets 8 more tulips. How many tulips does she have?

A. Use a strategy to solve. Draw to show your work.

THINK: I can make a ten.

Answer:

I have the quick picture of the numbers 64 and 8

I can make ten

There are 4 and 8 that is 12 ones

12 ones is 1 ten 2 ones

So, 6 tens + 1 tens = 7 tens

64 + 8 = 7 tens 2 ones

B. Laney has _________ tulips.

Answer:

Laney has 72 tulips.

**Turn and Talk** What other strategies could you use to solve this problem? Explain.

Answer:

I can count on or count back to solve the problem.

**Check Understanding**

**Solve. Draw to show your thinking.**

Question 1.

There are 60 cows in a field. 50 cows go to the barn. How many cows are still in the field?

_________ cows

Answer:

Explanation:

There are 60 cows in a field

50 cows go to the barn

60 – 50 =

I drew 6 tens and took away 5 tens

1 ten is left

60 – 50 = 10

10 cows are still in the field.

**On Your Own**

**Solve.**

Question 2.

Mrs. Kelsie has 32 red apples and 21 green apples. How many apples does she have?

_________ apples

Answer:

53 apples

Explanation:

Mrs. Kelsie has 32 red apples and

21 green apples

32 + 21 =

32 = 3 tens 2 ones

21 = 2 tens 1 ones

32 + 21 = 5 tens 3 ones

So, Kelsie have 53 apples.

Question 3.

**Reason** Marco counts 80 pears. He counts 20 fewer peaches than pears. How many peaches does Marco count?

____________ peaches

Answer:

60 peaches

Explanation:

Marco counts 80 pears

He counts 20 fewer peaches than pears

80 – 20 =

Start at 80 count back by 10’s till 20

80 before, 70, 60

I reached at 60

80 – 20 = 60

So, Marco counts 60 peaches.

Question 4.

**Construct Arguments** Mr. Jones bikes 20 miles to his office. Describe how to find the number of miles he bikes to his office and home again. Solve the problem.

Answer:

Question 5.

Margo finds 57 orange leaves and 7 red leaves. How many leaves does she find?

__________ leaves

Answer:

64 leaves

Explanation:

Margo finds 57 orange leaves and 7 red leaves

57 + 7 =

Make ten:

7 ones + 7 ones = 1 ten 4 ones

5 ten + 1 ten and 4 ones

= 6 tens 4 ones

57 + 7 = 64

So, Margo finds 51 leaves.

**Solve. Draw or write to explain.**

Question 6.

Kathy sees 32 orange carrots and 5 purple carrots in the garden. How many carrots does she see?

_________ carrots

Answer:

Explanation:

Kathy sees 32 orange carrots and 5 purple carrots in the garden

Add 32 and 5

3 tens 2 ones + 5 ones

= 3 tens + (5+2) ones

= 3 tens 7 ones

32 + 5 = 37

So, Kathy have 37 carrots in all.

Question 7.

**Reason** Sam counts 50 potatoes. Jalen counts 30 potatoes. How many potatoes do Sam and Jalen count together?

_________ potatoes

Answer:

Explanation:

Sam counts 50 potatoes

Jalen counts 30 potatoes

50 + 30 =

Start at 50 count on by 10’s

Count more 3 times

50 after 60, 70 and 80

50 + 30 = 80

So, Sam and Jalen count 80 potatoes all together.

Question 8.

**Construct Arguments** Mr. Caleb has 30 brown eggs. He has 20 more brown eggs than white eggs. How many white eggs does Mr. Caleb have?

_________ white eggs

Does your answer make sense? Explain.

Answer:

Explanation:

Mr. Caleb has 30 brown eggs

He has 20 more brown eggs than white eggs

Number of white eggs = 30 + 20

3 tens + 2 tens = 5 tens

30 + 20 = 50

So, there are 50 white eggs.