Show:
Facts
Friendly Numbers
Large Number Multiplication
Long Division
Estimating friendly numbers
100

8 x 3

24

100

20 x 30

600

100

23 x 4

92

100

230 / 10

23

100

19 x 9

Around 200 (20 x 10)

200

63 / 9

7
200

400 x 7

2 800

200

156 x 5

780

200

76 / 4

19

200

263 x 4

Will Accept:

300 x 4 = 1 200

or

250 x 4 =1 200

300

2 x 9 / 6

3

300

60 x 100 =

60 000

300

3485 x 3

10 455

300

428 / 3

142 R2

300

32 x 48 =

30 x 50 = 1 500

400

6 x 8 x 2

96

400

600 / 30

20

400

34 x 16

544

400

3172 / 8

396 R4

400

375 x 123 =

400 x 100 = 40 000

or 375 x 100 = 37 500

500

3 x 7 x 2 / 6

7

500

560 / 70

8

500

845 x 62

52 390

500

6048 / 32

189 

500

765 / 43

800 / 40 = 20