# Math in Focus Grade 1 Cumulative Review for Chapters 16 and 17 Answer Key

Go through the Math in Focus Grade 1 Workbook Answer Key Cumulative Review for Chapters 16 and 17 to finish your assignments.

## Math in Focus Grade 1 Cumulative Review for Chapters 16 and 17 Answer Key

Concepts and Skills

Count in tens and ones. Fill in the blanks.

Question 1.

10,20,30,40,50,60,70,80,81,82,83,84.

Explanation:
In the above image, we can see that there are 8 tens and 4 ones which is 84. And also can be written as 10,20,30,40,50,60,70,80,81,82,83,84.

Write the number in words.

Question 2.
57 ___________
57 in words is Fifty seven.

Question 3.
93 _____________
93 in words is Ninety-three.

Write the number.

Question 4.
forty-eight ____________
Forty-eight in number is 48.

Question 5.
sixty-nine _____________
Sixty-nine in number is 69.

Fill in the blanks.

Question 6.
4 and 90 make _____________
94

Explanation:
4 and 90 make 90+4 = 94.

Question 7.
____________ and 5 make 75.
70.

Explanation:
70 and 5 make 75.

Estimate. Then count.

Question 8.

Estimate _____________
Count ____________
Estimate: 50
Count: 45.

Explanation:
In the above image, we can see that there are 5 groups with 10 items. So the estimated count is 5×10 which is 50 and the actual count is 45.

Fill in the blanks.

Question 9.
___________ = ____________ tens __________ ones
57 = 5 tens 7 ones.

Explanation:
In the above image, we can see that there are 5 tens and 7 ones which is 57.

Count the base-ten blocks. Fill in the blanks.

Question 10.

___________ = ____________ tens __________ ones
___________ + ___________ = ___________
86 = 80+6.
80+6 = 86.

Explanation:
In the above image, we can see that there are 8 tens and 6 ones which is 86.
80+6 = 86.

Fill in the place-value charts.

Question 11.

27 = 2 tens and 7 ones.

Explanation:
Here, place value is a value represented by a digit in a number on the basis of its position in the number. So the place value of 27 is 2 in the tens place and 7 in ones place.

Question 12.

83 = 8 tens and 3 ones.

Explanation:
Here, place value is a value represented by a digit in a number on the basis of its position in the number. So the place value of 83 is 8 in the tens place and 3 in ones place.

Find the missing numbers.

Question 13.
2 more than 54 is ____________.
56.

Explanation:
2 more than 54 is 54+2 which is 56.

Question 14.
3 less than 65 is ____________.
62.

Explanation:
3 less than 65 is 65-3 which is 62.

Question 15.
____________ is 2 more than 55.
57.

Explanation:
57 is 2 more than 55.

Question 16.
____________ is 2 less than 63.
61.

Explanation:
61 is 2 less than 63.

Question 17.

The missing digits are 80,85,95.

Explanation:
The missing digits are 80,85,95.

Compare. Fill in the blanks.

Question 18.
Set ____________ is ____________ more than Set ____________.
Set A is 7 more than Set B.

Question 19.
Set ____________ has more.
Set A has more.

Color the greater number.

Question 20.

80 is greater.

Explanation:
In the above numbers, 80 is greater than 71.

Question 21.

54 is greater.

Explanation:
In the above numbers, 54 is greater than 45.

Color the number that is less.

Question 22.

71 is less.

Explanation:
In the above numbers, 71 is less than 80.

Question 23.

89 is less.

Explanation:
In the above numbers, 89 is less than 91.

Fill in the blanks.

Question 24.

The least number is ____________.
The greatest number is ___________.
The least number is 15.
The greatest number is 41.

Explanation:
In the above numbers, the least number is 15 and the greatest number is 41.

Order the numbers from least to greatest.

Question 25.

50,67,76.

Explanation:
The numbers from least to greatest is 50,67,76.

Complete each number pattern.

Question 26.
73, 72, 71, __________, _________, 68, ___________
73,72,71,70,69,68,67.

Explanation:
The above pattern is 73,72,71,70,69,68,67.

Question 27.
50, 60, __________, 80, __________, __________
50,60,70,80,90,100.

Explanation:
The above pattern is 50,60,70,80,90,100.

Question 28.
82 + 7 = __________
82,83,84,85,86,87,88,89.

Explanation:
The sum of 82 and 7 is 82,83,84,85,86,87,88,89.

Question 29.
50 + 40 = __________
50+40 = 90.

Explanation:
The sum of 50+40 is 90.

Question 30.

76+7= 83.

Explanation:
The addition of 76 and 7 is 83.

Question 31.

26+38 = 64.

Explanation:
The addition of 26 and 38 is 64.

Fill in the missing numbers.

Question 32.
8 + 33 = _________

8+33 = 41.

Explanation:
The addition of 8 and 33 is 41.

Question 33.
64 + 19 = ________

64+19 = 83.

Explanation:
The addition of 64 and 19 is 83.

Count back to subtract.

Question 34.
97 – 6 = ___________
97-6 = 91.

Explanation:
Here, we will count back to find the subtraction of 97 and 6. Which is 97,96,95,94,93,92,91.

Question 35.
50 – 30 = ____________
50-30 = 20.

Explanation:
Here, we will count back to find the subtraction of 50-30 which is 20.

Subtract.

Question 36.

63-7 = 56.

Explanation:
The subtraction of 63 and 7 is 56.

Question 37.

90-6 = 84.

Explanation:
The subtraction of 90 – 6 is 84.

Fill in the missing numbers.

Question 38.
45 – 6 = _________

Explanation:
The subtraction of 45-6 is 39.

Question 39.
73 – 58 = __________

73-58 = 15.

Explanation:
The subtraction of 73-58 is 15.

Problem Solving

Solve.

Question 40.
A number is less than 30 but greater than 10. It has 6 in the ones place. What are the possible numbers?
16 and 26.

Explanation:
Given that a number is less than 30 but greater than 10 and it has 6 in the ones place. So the possible numbers is 16 and 26.

Question 41.
A number is 65 when you subtract 6 then add 7. What is the number? Circle the number.

64.

Explanation:
Given that a number is 65 when you subtract 6 then add 7. So the possible number is 64. As when we subtract 64-6 we will get 58 and then by adding 7 we will get 65.

Question 42.
Write an addition sentence to make 100. One of the numbers must have 3 in the ones place.
___________ + ___________ = 100