Factors
Standard algorithm
Long division
Estimation
100

Faactors of 19

1,19

100

9x6

54

100

70 divided by 1

70

100

89 rounded by the tens

90

200

Factors of 78?

 1, 2, 3, 6, 13, 26, 39, and 78

200

40x4

160

200

590 Divided by 72

8 R14

200

7096 rounded by  the thousands

7000

300

What are the factors of 999?

1, 3, 9, 27, 37, 111, 333, and 999.

300

84x9

752

300

30 divided by 28

1 R2

300

4833 rounded by the hundreds

4800

400

 Factors of 980?

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980.

400

10x6548

65480

400

21 divided by 3

7

400

985,742,945 rounded by the ten millions.

990,700,000

500

What are the factors of 768?

1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, and 768.

500

98x23

2254

500

19 divided by 1

19

500

16 rounded by the tens

20

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