Mental Math (Addition) | Addition & Subtraction (Give and Take) | Assessment | English | Grade 3

Choose the correct option to fill in the blank. ____ + 57 = 57 + 28

• 85

• 10

• 28

• 57

Answer explanation

We know that 57 + 28 is the same as 28 + 57 28 + 57 = 57 + 28

Tags

CCSS.1.OA.B.3

What is ten more than 546?

• 10

• 556

• 646

• 547

Answer explanation

Ten more than 546 = 10 + 546 = 556

Tags

CCSS.2.NBT.B.8

70 + 110 = ___

• 810

• 81

• 117

• 180

Answer explanation

70 + 110 = 70 + 100 + 10 = 80 + 100 = 180

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Which of the following will add up to give 70?

• 32 + 35 + 2

• 35 + 45

• 69 + 10

• 24 + 46

Answer explanation

Option 1 is wrong: 32 + 35 + 2 = 30 + 2 + 30 + 5 + 2 = 60 + 9 = 69 Option 2 is wrong: 35 + 45 = 30 + 5 + 40 + 5 = 70 + 10 = 80 Option 3 is wrong: 69 + 10 = 60 + 9 + 10 = 70 + 9 = 79 Option 4 is correct: 24 + 46 = 20 + 4 + 40 + 6 = 60 + 10 = 70

Tags

CCSS.2.NBT.B.5

Use < , > or = to compare the given numbers. 25 + 15 ____ 7 + 33

• <

• >

• #ERROR!

Answer explanation

25 + 15 = 20 + 5 + 10 + 5 = 30 + 10 = 40 7 + 33 = 7 + 3 + 30 = 10 + 30 = 40 Both side are equal (=)

Tags

CCSS.1.OA.B.3

A fruit seller has 20 good apples and 14 rotten apples. Tinku writes the following addition statement for the total number of apples: 20 good apples + 14 rotten apples = 34 apples in total How should she express the number of good apples using subtraction?

• 14 rotten apples - 34 apples in total = 20 good apples

• 34 apples in total - 14 rotten apples = 20 good apples

• 20 good apples - 14 rotten apples = 34 apples in total

• 34 apples in total - 20 good apples = 20 rotten apples

Answer explanation

From Tinku's addition, we know that there are 34 apples in total. If we take away 14 rotten apples from 34 total apples, we are left with 20 good apples. That is, 34 apples in total - 14 rotten apples = 20 good apples Option 2 is correct.

Tags

CCSS.1.OA.A.1