Unit 3 Review

Rounding by 10

100

Round 12 to the nearest 10

10

200

Round 54 to the nearest 10

50

300

Round 128 to the nearest 10

130

400

Round 376 to the nearest 10

380

500

Round 1,358 to the nearest 10

1,360

Rounding by 100

100

Round 123 to the nearest 100

100

200

Round 476 to the nearest 100

500

300

Round 395 to the nearest 100

400

400

Round 1,453 to the nearest 100

1,500

500

Round 3,432 to the nearest 100

3,400

True or False

100

653=213

False

200

103+28=100+31

True

300

350+210=500+60

True

400

124-98=234-52

False

500

854-324=238-167

False

Addition

100

43+28=

71

200

I went to the store and bought 45 apples, I then went to the market and bought 32 oranges. How many apples and oranges do I have together?

77

300

557+312=

869

400

What TWO numbers will get you as close to 1000 as possible? 

Remember this is about Rounding. 

655    300    213      525

300 

655 

If you round 655 to the nearest hundred you get 700. 700 plus 300 is 100

500

843+923

1,766

Subtraction

100

91-19

72

200

187-32=

155

300

I went shopping and had $30 in my pocket. I bought three chistmas gifts that were $5 each. How much money do I have left?

30-5=25

25-5=20

20-5=15  dollars left

or you do 30-15= $15 left

400

73-28=____+13

32

500

543-529=____-530

544