We included HMH Into Math Grade 1 Answer Key PDF Module 13 Review to make students experts in learning maths.

Concepts and Skills

Question 1.
40 + 25 = ___________

Explanation:
I drew 4 tens and 2 tens 5 ones
There are 6 tens 5 ones
40 + 25 = 65
The sum of 40 and 25 is 65.

Question 2.
50 – 30 = ___________

Explanation:
I drew 5 tens and took away 3 tens
50 – 30 = 20
The difference of 50 and 30 is 20.

Question 3.
20 + 46 = ___________

Explanation:
I drew 2 tens and 4 tens 6 ones
There are 6 tens 6 ones
So, 20 + 46 = 66
The sum of 20 and 46 is 66.

Question 4.
90 – 50 = ___________

Explanation:
I drew 9 tens and took away 5 tens
90 – 50 = 40
The difference of 90 and 50 is 40.

Question 5.

Explanation:
The sum of 65 and 22 is 87
65 + 22 = 87.

Question 6.

Explanation:
The sum of 40 and 49 is 89
40 + 49 = 89.

Question 7.

Explanation:
The difference of 80 and 30 is  50
80 – 30 = 50.

Question 8.

Explanation:
The sum of 53 and 38 is 91
58 + 38 = 91.

Fill in the bubble next to the correct answer.

Question 9.
Koya has 58 red buttons and 8 blue buttons. How many buttons does she have?
(A) 66 buttons
(B) 57 buttons
(C) 56 buttons
(A) 66 buttons

Explanation:
Koya has 58 red buttons and 8 blue buttons
58 + 8 =
Start at 58 and count 8 more
I reach at 66
So 58+ 8 = 66
There are 66 buttons with Koya.

Question 10.
There are 12 jars of peanuts on a shelf. Mr. Grace buys 3 of them. How many jars of peanuts are on the shelf now?
(A) 11 jars
(B) 10 jars
(C) 9 jars
(C) 9 jars

Explanation:
There are 12 jars of peanuts on a shelf
Mr. Grace buys 3 of them
12 -3 =
Make ten to subtract
12 – 2 – 1
=10 -1 = 9
So, 12 – 3 = 9
3 jars of peanuts are on the shelf now.

Question 11.
Delaney has 80 marbles. She gives 20 marbles to her friend. How many marbles does Delaney have now?
(A) 90 marbles
(B) 70 marbles
(C) 60 marbles
(B) 70 marbles

Explanation:
Delaney has 80 marbles
She gives 20 marbles to her friend
Subtract 20 from 80 to find the answer
Start at 80 count back by 10’s 2 times
80 before 70 , 60
80 – 20 = 60
So, Delaney have 60 marbles now.

Question 12.
Sara swims 24 laps. Then she swims 25 more laps. How many laps does she swim?
(A) 49 laps
(B) 43 laps
(C) 37 laps
(A) 49 laps

Explanation:
Then she swims 25 more laps
Add 24 and 25 to find total
2 tens 4 ones + 2 tens 5 ones = 4 tens 9 ones
So, 24 + 25 = 49
So, Sara swims 49 laps in all.

Use the hundred chart to solve.

Question 13.
Beth counts 54 peaches. Don counts some peaches. They count 74 peaches in all. How many peaches does Don count?

_________ peaches

Explanation:
Beth counts 54 peaches
Don counts some peaches
They count 74 peaches in all
74 – 54 =
Start at 74 count back by 10’s
74 before 64, 54
I counted 2 tens
So, 74 – 54 = 20
Don counts 20 peaches.

Question 14.
16 – 7 = _________
16 – 7 = 9

Explanation:
Make ten to subtract:
16 – 7
= 16 – 6 – 1
= 10 – 1
= 9
So, 16 – 7 = 9.

Question 15.
8 + 5 = ___________
8 + 5 = 13

Explanation:
Start at 8 count 5 more
8 after 9, 10, 11, 12, 13
So, 8 + 5 = 13.

Question 16.
6 + 9 = ___________
6 + 9 = 15

Explanation:
Start at 9
Count 6 more
9 after 10, 11, 12, 13, 14, 15
So, 6 + 9 = 15.

Question 17.
14 – 8 = ___________