3rd Grade Topic 2 Review Quiz Rounding Adding/Subtraction

Rex has 212 football cards and 596 baseball cards. Which number sentence shows the best estimate of how many cards Rex has in all.

• 500+600=1,100

• 200+600=800

• 300+600=900

• 300+500=800

Mario wants to have 15 insects in his collection. He has 8 insects already. Which number sentence shows a way to find how many more insects Mario needs.

• 15 -___=8

• 15 - 8=__

• 8+15=___

• 8-15=___

Tom had $41. He spent $17. Which is the best estimate of how much he had left?

• 20

• 60

• 10

• 30

Which number sentence does NOT belong in the fact family 4+7=11

• 11-4=7

• 7+4=11

• 11-7=4

• 7-11=4

There were 98 tropical fish at the store. 76 were sold. How many fish are left. Use mental math to solve.

• 22

• 32

• 38

• 174

There are 6 stickers on one sheet. There are 7 stickers on the other sheet. What is the number sentence that would show how many stickers altogether?

• 6+7=13

• 7-6=1

• 7+7=14

• 6+7=12

What is the missing number? 54 + 63 = 63+ ___

• 63

• 54

• 117

• 17

(2+3) + 4 = (4+2) + ___

• 6

• 2

• 3

• 10

Which one rounds to 900 rounded to the nearest 100?

• 876

• 843

• 957

• 1,045

Round 45 to the nearest 10.

• 50

• 40

• 30

• 60