Rounding to 10
Rounding to 100
Rounding to 1,000
Estimating Sums
Estimating Differences
100

 Round 34 to the nearest 10.

30

100

Round 134 to the nearest 100.

100

100

Round 2,345 to the nearest 1,000.

2,000

100

23 + 45 = ?

70

100

45 – 23 = ?

30

200

Round 88 to the nearest 10.

90

200

Round 276 to the nearest 100.


300

200

Round 5,678 to the nearest 1,000. 

6,000

200

128 + 437 = ? 


500

200

500 – 287 = ? 


200

300

Round 145 to the nearest 10.

150

300

Round 449 to the nearest 100. 

400

300

Round 9,450 to the nearest 1,000.

9,000

300

764 + 289 = ? 


1,100

300

1,234 – 678 = ?

500

400

Round 271 to the nearest 10. 

270

400

Round 750 to the nearest 100. 

800

400

Round 12,750 to the nearest 1,000.


13,000

400

3,245 + 678 = ? (Answer: 3,923)

4,000

400

7,890 – 4,567 = ?

3,000

500

Round 999 to the nearest 10. 

1,000

500

Round 1,249 to the nearest 100.

1,200

500

$500: Round 27,499 to the nearest 1,000.


27,000

500

9,876 + 4,589 = ? 

15,000

500

15,000 – 9,876 = ?

5,000

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