Comparing and Ordering Numbers
Rounding Numbers
Estimating Sums and Differences
Subtracting and Adding
Subtracting Across Zeros
100
Compare 2,561 and 2,261 using the correct symbol.
2,561>2,261
100
Round this number to the nearest ten. 85,639
85,640
100
Estimate by rounding to the nearest ten, then solve. 542 + 27
540 + 30 = 570
100
Solve. 3,258 + 1,761
5,019
100
Solve. 810 - 638
172
200
Write these numbers in order from least to greatest: 18,764 18,761 13,490
13,490 18,761 18,764
200
Round to the nearest thousand: 417,547
418,000
200
Estimate by rounding to the nearest ten, then solve. 5,323 - 2,611
5,320 - 2,610 = 2,710
200
Solve. 78 + 421
499
200
Solve. 1,001 - 868
133
300
Compare: 999,999 ____ 990,999
999,999 > 990,999
300
Round to the nearest thousand: 456,798
457,000
300
Estimate by rounding to the nearest hundred, then solve. 918 + 391
900 + 400 = 1,300
300
Solve. 1,931 - 509
1,422
300
Solve. 5,025 - 178
4,847
400
Write three numbers greater than 780,000 but less than 781,000
Answers vary. Your teacher is the judge.
400
Round to the nearest ten thousand: 699,714
700,000
400
Estimate by rounding to the nearest hundred, then solve. 551 - 249
600 - 200 = 400
400
Solve. 8,476 - 2,185
6,291
400
Solve. 6,090 - 5,130
960
500
Compare: 14+4 ____ 12+4
14+4 > 12+4
500
Round to the nearest ten thousand: 999,871
1,000,000
500
Estimate by rounding to the nearest hundred, then solve. 1,724 - 731
1,700 - 700 = 1,000
500
Solve. 15,891 + 527 + 1,086
17,504
500
Solve. 10,807 - 4,373
6,434
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