December 4: Adding & Subtracting 2-Digit Numbers
Authored by Rachel Godwin
Mathematics
4th Grade
CCSS covered
Used 28+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Jessica added 27 + 3 + 50 + 2 mentally. What number was she adding to 27?
27 + ____
50
55
53
52
Tags
CCSS.1.OA.C.6
CCSS.2.OA.B.2
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Choose a way to add 45 + 38 mentally.
45 + 40 - 2
45 + 40 + 2
45 + 20 + 2 + 2
50 + 40 + 5 + 2
Tags
CCSS.2.NBT.B.6
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Jackson is adding 56 + 37 mentally. Choose the mental math strategy that would work
56 + 4 + 30 + 7
(56 + 3) + (37 + 3) = 59 +40
56 + 4 + 30 + 3
Tags
CCSS.2.NBT.B.7
4.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
Jaylen subtracted a number from 76 in parts mentally like this:
76 - 6 - 30 - 3
What number was he subtract from 76?
76 - (a) ?
Tags
CCSS.1.OA.C.6
CCSS.2.OA.B.2
5.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
Fatima subtracted 92 - 56 by adding up from 56 to 92 in parts mentally like this:
56 + 4 + 30+ (a) =92
What is the missing part?
Tags
CCSS.1.NBT.C.4
CCSS.2.MD.B.6
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Choose a way to subtract 87 - 38 mentally.
87 - 40 - 2
(87 + 2) - (38 + 2) = 89 - 40
87- 40 + 3
Tags
CCSS.2.NBT.B.5
7.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
93 - 57 = ?
(a)
Tags
CCSS.2.NBT.B.5
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