Mental Math ~ Addition
Authored by Sydney Welch
Mathematics
3rd Grade
CCSS covered
Used 1+ times
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5 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Click the strategy that was used to solve this problem:
38 + 57
57 = 55 + 2
38 + 2 = 40
40 + 55 = 95
Break Apart
Make a 10
Make a 100
Tags
CCSS.2.NBT.B.7
CCSS.2.NBT.B.5
CCSS.2.NBT.B.6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Click the strategy that was used to solve this problem:
123 + 156
123 = 100 + 20 + 3
156 = 100 + 50 + 6
100 + 100 = 200
20 + 50 = 70
3 + 6 = 9
200 + 70 + 9 = 279
Break Apart
Make a 10
Make a 100
Tags
CCSS.2.NBT.B.7
CCSS.2.NBT.B.5
CCSS.2.NBT.A.1
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Click the strategy that was used to solve this problem:
595 + 146
146 = 141 + 5
595 + 5 = 600
600 + 141 = 741
Breaking Apart
Make a 10
Make a 100
Tags
CCSS.2.NBT.B.7
CCSS.2.NBT.A.1
CCSS.2.NBT.B.9
4.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Use mental math to add:
29 + 536 =
Type your answer below.
Tags
CCSS.2.NBT.B.7
CCSS.2.NBT.B.5
5.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Use mental math to add 132 + 122 =
Type your answer.
Tags
CCSS.2.NBT.B.7
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