estimate using compatible
rounding
multiply
prime and composite
factor or multiples
100

 653x6

3900

100

67373 to the nearest ten thousand

70000

100

200x9

1800

100
74

composite

100

is 55 a factor or multiple of 11

multiples

200

629x3

1950

200

round 6944 to the nearest hundred

6900

200

5x200

1000

200

73

 prime

200

2 a factor or multiple or 10

factor

300
281x6

1500

300

round 66434 to the nearest 10

66430

300

70x6

420

300

65

composite


300

6 a factor or multiple of 12

factor

400

711x8

6000

400

round 685831 to the nearest ten thousand

695000

400

6000x6

36000

400
25

composite

400

56 a multiple or factor of 7

multiple

500

672x7

4550

500

round 95040 to nearest ten thousand

10000

500

5000x3

15000

500

53

prime

500

72 a multiples or factor of 8

multiple