This handy Spectrum Math Grade 4 Answer Key Chapter 1 Lesson 1.8 Thinking Addition for Subtraction provides detailed answers for the workbook questions.
Spectrum Math Grade 4 Chapter 1 Lesson 1.8 Thinking Addition for Subtraction Answers Key
Subtract. Then, Check your answer.
Question 1.
a.
Answer:
Explanation:
By subtracting 45 from 88 we will get 43
88 – 45 = 43
By adding 45 to 43 we will get 88
43 + 45 = 88
Both the numbers are same.
b.
Answer:
Explanation:
By subtracting 19 from 23 we will get 4
23 – 19 = 4
By adding 19 to 4 we will get 23
4 + 19 = 23
Both the numbers are same.
c.
Answer:
Explanation:
By subtracting 28 from 47 we will get 19
47 – 28 = 19
By adding 28 to 19 we will get 47
19 + 28 = 47
Both the numbers are same.
d.
Answer:
Explanation:
By subtracting 38 from 95 we will get 57
95 – 38 = 57
By adding 38 to 57 we will get 95
57 + 38 = 95
Both the numbers are same.
e.
Answer:
Explanation:
By subtracting 27 from 74 we will get 47
74 – 27 = 47
By adding 27 to 47 we will get 74
47 + 27 = 74
Both the numbers are same.
f.
Answer:
Explanation:
By subtracting 73 from 98 we will get 25
98 – 73 = 25
By adding 73 to 25 we will get 98
25 + 73 = 98
Both the numbers are same.
Question 2.
a.
Answer:
Explanation:
By subtracting 17 from 38 we will get 21
38 – 17 = 21
By adding 17 to 21 we will get 38
21 + 17 = 38
Both the numbers are same.
b.
Answer:
Explanation:
By subtracting 27 from 68 we will get 41
68 – 27 = 41
By adding 27 to 41 we will get 68
41 + 27 = 68
Both the numbers are same.
c.
Answer:
Explanation:
By subtracting 36 from 54 we will get 18
54 – 36 = 18
By adding 36 to 18 we will get 54
18 + 36 = 54
Both the numbers are same.
d.
Answer:
Explanation:
By subtracting 32 from 49 we will get 17
49 – 32 = 17
By adding 32 to 17 we will get 49
17 + 32 = 49
Both the numbers are same.
e.
Answer:
Explanation:
By subtracting 10 from 29 we will get 19
29 – 10 = 19
By adding 10 to 19 we will get 29
19 + 10 = 29
Both the numbers are same.
f.
Answer:
Explanation:
By subtracting 39 from 78 we will get 39
78 – 39 = 39
By adding 39 to 39 we will get 78
39 +39 = 78
Both the numbers are same.
Question 3.
a.
Answer:
Explanation:
By subtracting 28 from 155 we will get 127
155 – 28 = 127
By adding 28 to 127 we will get 155
127 + 28 = 155
Both the numbers are same.
b.
Answer:
Explanation:
By subtracting 38 from 132 we will get 94
132 – 38 = 94
By adding 38 to 94 we will get 132
94 + 38 = 132
Both the numbers are same.
c.
Answer:
Explanation:
By subtracting 82 from 179 we will get 97
179 – 82 = 97
By adding 82 to 97 we will get 179
97 + 82 = 179
Both the numbers are same.
d.
Answer:
Explanation:
By subtracting 89 from 127 we will get 38
127 – 89 = 38
By adding 89 to 38 we will get 127
38 + 89 = 127
Both the numbers are same.
e.
Answer:
Explanation:
By subtracting 62 from 141 we will get 79
141 – 62 = 79
By adding 62 to 79 we will get 141
79 + 62 = 141
Both the numbers are same.
f.
Answer:
Explanation:
By subtracting 52 from 137 we will get 85
137 – 52 = 85
By adding 52 to 85 we will get 137
85 +52 = 137
Both the numbers are same.
Question 4.
a.
Answer:
Explanation:
By subtracting 99 from 187 we will get 88
187 – 99 = 88
By adding 99 to 88 we will get 187
88 + 99 = 187
Both the numbers are same.
b.
Answer:
Explanation:
By subtracting 20 from 119 we will get 99
119 – 20 = 99
By adding 20 to 99 we will get 119
99 + 20 = 119
Both the numbers are same.
c.
Answer:
Explanation:
By subtracting 73 from 192 we will get 119
192 – 73 = 119
By adding 73 to 119 we will get 192
119 + 73 = 192
Both the numbers are same.
d.
Answer:
Explanation:
By subtracting 39 from 108 we will get 69
108 – 39 = 69
By adding 39 to 69 we will get 108
69 + 39 = 108
Both the numbers are same.
e.
Answer:
Explanation:
By subtracting 90 from 188 we will get 98
188 – 90 = 98
By adding 90 to 98 we will get 188
98 + 90 = 188
Both the numbers are same.
f.
Answer:
Explanation:
By subtracting 78 from 164 we will get 86
164 – 78 = 86
By adding 78 to 86 we will get 164
86 + 78 = 164
Both the numbers are same.