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Grade 3 Go Math Answer Key Chapter 7 Division Facts and Strategies Extra Practice
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Common Core – Page No. 149000
Lessons 7.1–7.2
Find the quotient. You may want to draw a quick picture to help.
Question 1.
8 ÷ 2 = ______
Answer: 4
Question 2.
______ = 14 ÷ 2
Answer: 7
Question 3.
18 ÷ 2 = ______
Answer: 9
Question 4.
______ = 12 ÷ 2
Answer: 6
Question 5.
70 ÷ 10 = ______
Answer: 7
Question 6.
50 ÷ 10 = ______
Answer: 5
Question 7.
40 ÷ 10 = ______
Answer: 4
Question 8.
90 ÷ 10 = ______
Answer: 9
Lessons 7.3–7.4
Find the quotient.
Question 9.
15 ÷ 5 = ______
Answer: 3
Explanation:
5 divides 15 into 3 equal groups. So the quotient of 15 and 5 is 3.
Question 10.
______ = 45 ÷ 5
Answer: 9
Explanation:
5 divides 45 into nine equal groups. Thus the quotient is 9.
Question 11.
______ = 10 ÷ 5
Answer: 2
Explanation:
5 divides 10 two times. So the quotient of 10 and 5 is 2.
Question 12.
40 ÷ 5 = ______
Answer: 8
Explanation:
5 divides 40 into eight equal groups. So the quotient is 8.
Question 13.
6 ÷ 3 = ______
Answer: 2
Explanation:
3 divides 6 into two equal groups. Thus the quotient is 2.
Question 14.
______ = 21 ÷ 3
Answer: 7
Explanation:
3 divides 21 into seven equal groups. So the quotient is 7.
Question 15.
______ = 24 ÷ 3
Answer: 8
Explanation:
3 divides 24 eight times. Thus the quotient is 8.
Question 16.
______ = 18 ÷ 3
Answer: 6
Explanation:
3 divides 18 into six equal parts. Therefore the quotient is 6.
Question 17.
There are 30 balloons arranged in 6 equal groups. How many balloons are in each group?
______ balloons
Answer: 5 balloons
Explanation:
Total number of balloons = 30
Number of balloons arranged in equals groups = 6
Number of balloons in each group = x
Divide the number of balloons by a number of equal groups.
= 30 ÷ 6 = 5 balloons
Therefore number of balloons in each group = 5
Question 18.
Mr. Song spends $27 on sports drinks. Each bottle costs $3. How many bottles does Mr. Song buy?
______ bottles
Answer: 9
Explanation:
Given,
Mr. Song spends $27 on sports drinks. Each bottle costs $3.
Number of bottles he bought = x
x × 3 = 27
x = 27 ÷ 3 = 9
Thus Mr. Song bought 9 bottles.
Lesson 7.5
Find the quotient.
Question 19.
28 ÷ 4 = ______
Answer: 7
Explanation:
4 divides 28 seven times. So the quotient is 7.
Question 20.
______ = 16 ÷ 4
Answer: 4
Explanation:
4 divides 16 four times. The quotient of 16 and 4 is 4.
Question 21.
______ = 20 ÷ 4
Answer: 5
Explanation:
4 divides 20 five times. Thus the quotient is 5.
Question 22.
______ = 32 ÷ 4
Answer: 8
Explanation:
4 divides 32 eight times. So the quotient of 32 and 4 is 8.
Question 23.
4)\(\bar { 3 6 }\)
______
Answer: 9
Explanation:
4 divides 36 nine times. Thus the quotient is 9.
Question 24.
4)\(\bar { 1 2 }\)
______
Answer: 3
12 ÷ 4
4 divides 12 three times. So the quotient of 12 and 4 is 3.
Question 25.
4)\(\bar { 2 4 }\)
______
Answer: 6
Explanation:
4 divides 24 six times. Thus the quotient is 6.
24 ÷ 4 = 6
Question 26.
4)\(\bar { 4 }\)
______
Answer: 1
Explanation:
Any number divides by the same number will be always 1. Thus the quotient is 1.
Find the unknown number.
Question 27.
a = 40 ÷ 4
a = _____
Answer: 10
Explanation:
Let the unknown number be a
4 divides 40 ten times.
a = 40 ÷ 4
a = 40/4 = 10
Therefore a = 10
Question 28.
0 ÷ 4 = b
b = _____
Answer: 0
Explanation:
0 divides by any number are always 0. So the value of b is 0.
Question 29.
c = 36 ÷ 4
c = ______
Answer: 9
Explanation:
Let c be the unknown number
36 ÷ 4 = C
4 divides 36 nine times.
Thus the value of c is 9.
Question 30.
8 ÷ 4 = d
d = ______
Answer: 2
Explanation:
d is the unknown number
d = 8 ÷ 4
4 divides 8 two times.
Thus the value of d is 2.
Common Core – Page No. 150000
Lessons 7.6–7.7
Find the unknown factor and quotient.
Question 1.
7 × ______ = 35 35 ÷ 7 = ______
Answer: 5, 5
Explanation:
Let the unknown factor be x
7 × x = 35
x = 35 ÷ 7
x = 5
Now check whether the related multiplication and division facts are the same.
35 ÷ 7 = 5
Thus the unknown factor and quotient are the same. So the answer is 5.
Question 2.
6 × ______ = 54 54 ÷ 6 = ______
Answer: 9, 9
Explanation:
Let the unknown factor be y
6 × y = 54
y = 54 ÷ 6
6 divides 54 nine times. Thus the unknown factor is 9.
Now check if the related multiplication and division facts are the same.
54 ÷ 6 = 9
Therefore the unknown factor and the quotient are the same I.e., 9
Question 3.
6 × ______ = 18 18 ÷ 6 = ______
Answer: 3, 3
Explanation:
Let the unknown factor be t
6 × t = 18
t = 18/6 = 3
Now check the related multiplication and division facts of the equation
18 ÷ 6 = 3
The related multiplication and division facts are the same.
Thus the unknown factor and quotient are 3.
Question 4.
7 × ______ = 49 49 ÷ 7 = ______
Answer: 7, 7
Explanation:
Let the unknown factor be x
7 × x = 49
x = 49/7 = 7
Check whether the related multiplication and division facts of the equation are the same or not.
49 ÷ 7 = 7
By thus we can say that the related facts are the same. So the unknown factor and quotient are 7.
Find the quotient.
Question 5.
36 ÷ 6 = ______
Answer: 6
Explanation:
First take the factors of 6
Factors of 6 are 3, 2
First divide 36 by 3
36 ÷ 3 = 12
Now divide 12 by 2
12 ÷ 2 = 6
So the quotient is 6.
Question 6.
48 ÷ 6 = ______
Answer: 8
Explanation:
The factors of 6 are 3 and 2
First divide by 3
48 ÷ 3 = 16
Now divide 16 by 2
16 ÷ 2 = 8
So the quotient is 8.
Question 7.
7)\(\bar { 6 3 }\)
______
Answer: 9
Explanation:
The factors of 7 are 1, 7
Divide 63 by 7
7 divides 63 nine times. So the quotient is 9.
Question 8.
7)\(\bar { 5 6 }\)
______
Answer: 8
Explanation:
The factors of 7 are 1, 7
7 divides 56 eight times. So the quotient is 8.
Lessons 7.8–7.9
Find the quotient.
Question 9.
40 ÷ 8 = ______
Answer: 5
Explanation:
Factors of 8 is 4, 2
First divide by 4
40 ÷ 4 = 10
Next divide 10 by 2
10 ÷ 2 = 5
So the quotient is 5.
Question 10.
______ = 24 ÷ 8
Answer: 3
Explanation:
The factors of 8 is 4 and 2
Divide 24 by 4
24 ÷ 4 = 6
Now divide 6 by 2
6 ÷ 2 = 3
So the quotient of 24 ÷ 8 = 3
Question 11.
72 ÷ 9 = ______
Answer: 8
Explanation:
The factors of 9 are 3, 3
First divide 72 by 3
72 ÷ 3 = 24
Next divide 24 by 3
24 ÷ 3 = 8
The quotient of 72 ÷ 9 = 8
Question 12.
______ = 81 ÷ 9
Answer: 9
Explanation:
The factors of 9 are 3, 3
Divide 81 by 3
81 ÷ 3 = 27
Now divide 27 by 3
27 ÷ 3 = 9
The quotient of 81 ÷ 9 = 9
Find the unknown number.
Question 13.
36 ÷ 9 = m
m = ______
Answer: 4
Explanation:
Let m be the unknown number
The factors of 9 are 3, 3
First, divide by 3
36 ÷ 3 = 12
Next divide 12 by 3
12 ÷ 3 = 4
So the value of m is 4.
Question 14.
18 ÷ 9 = â–
â– ______
Answer: 2
Explanation:
Take the factors of 9
Divide 18 by 3
18 ÷ 3 = 6
Now divide 6 by 3
6 ÷ 3 = 2
â– = 2
Question 15.
48 ÷ 8 = b
b = ______
Answer: 6
Let b be the unknown number
The factors of 8 is 4, 2
Divide 48 by 4
48 ÷ 4 = 12
Next divide 12 by 2
12 ÷ 2 = 6
Therefore the value of b = 6
Question 16.
56 ÷ 8 = p
p = ______
Answer: 7
Explanation:
Let p be the unknown number
The factors of 8 are 4, 2
First, divide 56 by 4
56 ÷ 4 = 14
Next divide 14 by 2
14 ÷ 2 = 6
The value of p is 6.
Lesson 7.10
Question 17.
At a store, there are 5 vases. Each vase has the same number of flowers. Sixteen flowers are sold. Now there are 24 flowers left. How many flowers were in each vase?
______ flowers
Answer: 8 flowers
Explanation:
Given that,
Number of vases = 4
Number of flowers sold = 16
Number of flowers left = 24
Total number of flowers = 16 + 24 = 40
To find the number of flowers in each vase you need to divide the total number of flowers by number of vases
= 40 ÷ 5 = 8 flowers
Thus the number of flowers in each vase = 8
Question 18.
Lizzy bought 4 bags of apples. Each bag had the same number of apples. Her mom gave her 8 more apples. Now Lizzy has 36 apples. How many apples were in each bag?
______ bags
Answer: 7 apples
Explanation:
Given,
Lizzy bought 4 bags of apples.
Number of apples her mother gave = 8
Number of apples now Lizzy have = 36
To find the actual number of apples before her mother gave, we need to subtract 8 from 36
36 – 8 = 28
Now divide the number of apples by number of bags
28 ÷ 4 = 7 apples
Therefore the number of apples in each bag = 7 apples
Lesson 7.11
Follow the order of operations to find the unknown number.
Question 19.
10 − 3 + 4 = t
t = ______
Answer: 11
Explanation:
First subtract from left to right and then add
10 – 3 + 4 = 7 + 4 = 11
Therefore t = 11
Question 20.
8 − 3 × 2 = p
p = ______
Answer: 2
Explanation:
First multiple 3 and 2
3 × 2 = 6
And then subtract 6 from 8, you get 2
Thus p = 2
Question 21.
24 ÷ 6 + 2 = w
w = ______
Answer: 6
Explanation:
First, divide 24 and 6
24 ÷ 6 = 4
Now add from left to right
4 + 2 = 6
Therefore the unknown number w = 6
Conclusion
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