Show:
multiplication
Estimate Products
Division
estimate quotients
100

3x40

120


100

38x6=

240

100

40/2

20

100

87/3

30

200

50x5=

250

200

$219x6

$1,200

200

60/ 3

20

200

421/6

70

300

700x6=

4,200

300

28x3

90

300

240/4

60

300

283/4

70

400

3,000x4

12,000

400

53x7

350

400

540/9

60

400

849/9

90