Estimating
Mental Math
Multiples of 10
Multiplying
Wild Card
100

44x13

400

100

30x30

900

100

20x35

700

100

50x2

100

100

What is the name of the shape that has 6 sides?

hexagon

200

28x27

900

200

20x70

1,400

200

50x11

550

200

62x7

434

200

What is another way to write 1/2?

2/4; 3/6; 4/8; 5/10; 6/12

300

72x48

3,500

300

70x40

2,800

300

30x39

1,170

300

208x6

1,248

300

2,892+657

3,549

400

25x81

2,400

400

60x80

4,800

400

60x21

1,260

400

2,371x4

9,484

400

9,006-369

8,637

500

54x18

1,000

500

50x50

2,500

500

40x37

1,480

500

9,899x7

69,293

500

58x44

2,552

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