Round to the nearest TENS
Round to the nearest HUNDREDS
Surrounding TENS
Surrounding HUNDREDS
Estimate Sums
Estimate Differences
100

Round this number to the nearest ten:

71

70

100

Round this number to the nearest hundred:

202

200

100

When rounding to the nearest ten,

what are the two surrounding tens for 48?

40 and 50

100

When rounding to the nearest hundred,

what are the two surrounding hundreds for 148?

100 and 200

100

Estimate the sum to the nearest ten

38 + 41


80

100

Find the difference rounded to the nearest ten.

88 - 25

60

200

Round this number to the nearest ten:

58

60

200

Round this number to the nearest hundred:

579

600

200

When rounding to the nearest ten,

what are the two surrounding tens for 11?

10 and 20

200

When rounding to the nearest hundred,

what are the two surrounding hundreds for 561?

500 and 600

200

Estimate to the sum to the nearest ten 

32 + 39

70

200

Find the difference rounded to the nearest hundred.

918 - 556

300

300

Round this number to the nearest ten:

934

930

300

Round this number to the nearest hundred:

721

700

300

When rounding to the nearest ten,

what are the two surrounding tens for 644?

640 and 650

300

When rounding to the nearest hundred,

what are the two surrounding hundreds for 222?

200 and 300

300

Estimate the sum to the nearest hundred

183 + 201?

380

300

Find the difference rounded to the nearest hundred.

556 - 231

400

400

Round this number to the nearest ten:

145

150

400

Round this number to the nearest hundred:

839

800

400

When rounding to the nearest ten,

what are the two surrounding tens for 385?

380 and 390

400

When rounding to the nearest hundred,

what are the two surrounding hundreds for 949?

900 and 1,000

400

Which sum is about 540?

229 + 311   OR    481+113

229 + 311

400

Which difference is about 710?

911 - 203    OR    842 - 152

911 - 203

500

Round this number to the nearest ten:

777

780

500

Round this number to the nearest hundred:

900

900

500

When rounding to the nearest ten,

what are the two surrounding tens for 623?

620 and 630

500

When rounding to the nearest hundred,

what are the two surrounding hundreds for 612?

600 and 700

500

Which sum is about 600?

355+301 OR    292+311

 292+311

500

Which difference is about 400?

825 - 463    OR    639 - 242

639 - 242

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