Rounding to the Nearest 10
Rounding to the Nearest 100
Using Friendly Numbers
Reasonable Estimates
Properties/
Rounding (Cont)
100

9. Dale glued 136 tiles onto a table. To the nearest ten, how many tiles did Dale use? 

What is...

140 tiles 

100

4. What is the unknown number in this equation? 

9 + _____ = 9 

What is...

0

200

10. Is 380 a reasonable estimate for the equation using rounding to the nearest ten? 

129 + 248 = ____

What is...

Yes 

200

11. Does the following number equal 300 when rounded to the nearest hundred? 

342

What is...

Yes

200

5. What is a reasonable estimate of 529 +79 using compatible numbers? 

A. 500 + 50 = 550

B. 525 + 75 = 600

C. 550 + 100 = 650

D. 600 + 100 = 700 

What is...

B. 525 + 75 = 600

200

6. What has the same value as (35 + 25) + 12? 

______ + (25 + 12)

What is...

35 

300

10. Is 380 a reasonable estimate for the equation using rounding to the nearest ten? 

159 + 257 = ____

What is...

No

300

11. Does the following number equal 300 when rounded to the nearest hundred? 

247

What is...

No 

300

1. Gabby has 385 craft sticks. She uses 167 to make a dollhouse and 42 to make a doll bed. ABOUT how many craft sticks does Gabby have left? 

A. About 100 because 300 - 200 = 100

B. About 200 because 400 - 200 = 200 

C. About 250 because 400 - 150 = 250

D. About 300 because 400 - 100 = 300 

What is...

B. About 200 because 400 - 200 = 200

300

7. Add. 

615 + 55 + 296 = ____

What is...

966

400

10. Is 380 a reasonable estimate for the equation using rounding to the nearest ten? 

652 - 236 = ____

What is...

No

400

11. Does the following number equal 300 when rounded to the nearest hundred? 

356

What is...

No 

400

8. Ty uses friendly numbers to subtract. How should he adjust the difference? 


758 - 249 = 758 - 250 + ____

What is...

1

400

3. What is 562 rounded to the nearest hundred and the nearest 10? 

A. 600 and 560

B. 600 and 670

C. 500 and 560

D. 500 and 570

What is...

A. 600 and 560

500

10. Is 380 a reasonable estimate for the equation using rounding to the nearest ten? 

687 + 309 = ____

What is...

Yes

500

11. Does the following number equal 300 when rounded to the nearest hundred? 

291

What is...

Yes 

500

2. Which is these is another way to add 408 + 332? 

A. 400 + 330

B. 400 + 340

C. 410 + 300

D. 410 + 310

What is...

B. 400 + 340

500

12. Stuart and the coach are packing bottles of water to take to the baseball teams. 

Stuart counts the bottles in groups: 6, 12, 18. 

Part A

What are the next 3 numbers Stuart will count if he keeps using the smae addition pattern? 

______, _______, ________

Part B

What is true about the numbers in the counting pattern?

Select all the correct answers. 

A. Every other number is odd. 

B. Every number is an even number. 

C. Every number is followed by a number that is 10 greater. 

D. Every number is followed by a number that is 6 greater. 

E. Every number is followed by a number that is 3 greater. 

What is...

Part A

24, 30, 36

Part B

B & D

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