Round: Nearest Ten
Estimate with SUBTRACTION
(to nearest tens)
Round: Nearest Hundred
Estimate with addition (to nearest ten)
Ordering Numbers
100

Round 32 to the nearest ten

30

100

Estimate by rounding to the nearest tens: 

52 - 12

 50-10= about 40

100

Round 137 to the nearest hundred

100

100

Estimate the sum by rounding to the nearest ten:

47 + 52

50 + 50 = about 100

100

Put these numbers in order from least to greatest:
4,382 | 4,238 | 4,823 | 4,328

4,238 → 4,328 → 4,382 → 4,823

200

Round 85 to the nearest ten

90

200

Estimate the sum by rounding to the nearest tens:

85 - 68

90-70= About 30

200

Round 567 to the nearest hundred

600

200

Estimate the sum by rounding to the nearest ten:

12 + 83

10 + 80 = About 90

200

Put these numbers in order from least to greatest:
6,145 | 6,415 | 6,154 | 6,451

Answer: 6,145 → 6,154 → 6,415 → 6,451

300

Round 147 to the nearest ten

150

300

Estimate the sum by rounding to the nearest tens:

79 - 22

80-20= About 60

300

Round 890 to the nearest hundred

900

300

Estimate the sum by rounding to the nearest ten:

89 + 9

90 + 10 = About 100

300

Put these numbers in order from least to greatest:
3,972 | 3,279 | 3,729 | 3,297

Answer: 3,279 → 3,297 → 3,729 → 3,972

400

Round 99 to the nearest ten

100

400

Estimate the sum by rounding to the nearest tens:

82 - 42

80-40 = About 40

400

Round 1,522 to the nearest hundred

1,500

400

Estimate the sum by rounding to the nearest ten:

404 + 82

400 + 80 = About 480

400

Put these numbers in order from least to greatest:
8,503 | 8,305 | 8,530 | 8,035

Answer: 8,035 → 8,305 → 8,503 → 8,530

500

Round 464 to the nearest ten

460

500

Estimate the sum by rounding to the nearest tens: 

77 - 17

80-20 = about 40

500

Round 1,997 to the nearest hundred

2,000

500

Estimate the sum by rounding to the nearest ten:

903 + 99

900 + 100 = About 1,000

500

Put these numbers in order from least to greatest:
2,648 | 2,468 | 2,684 | 2,486

Answer: 2,468 → 2,486 → 2,648 → 2,684