Go through the Math in Focus Grade 3 Workbook Answer Key Chapter 2 Practice 3 More Mental Addition to finish your assignments.
Math in Focus Grade 3 Chapter 2 Practice 3 Answer Key More Mental Addition
Add mentally. First, add 100. Then, subtract the extra ones.
Example
Question 1.
26 + 96 = ?
26 + 100 = ___
26 + 96 = ___ – ___ – ___
= ____
So, 26 + 96 = ___
Answer:
26 + 100 = 126
26 + 96 = 126 – 4
= 122
So, 26 + 96 = 122
Question 2.
38 + 95 = ?
38 + 100 = ___
___ – ___ = ___
So, 38 + 95 = ___
Answer:
38 + 100 = 138
138 – 5 = 133
So, 38 + 95 = 133
Add mentally.
First, add the hundreds. Then, subtract the extra ones.
Example
Question 3.
98 + 96 = ?
100 + 100 = ___
98 + 96 = ___ – ___ – ___
= ___
So, 98 + 96 = ____
Answer:
100 + 100 = 200
98 + 96 = 200 – 2 – 4
= 194
So, 98 + 96 = 194
Question 4.
94 + 98 = ?
100 + 100 = ___
94 + 98 = ___ – ___ – ____
= ____
So, 94 + 98 = ___
Answer:
100 + 100 = 200
94 + 98 = 200 – 6 – 2
= 192
So, 94 + 98 = 192