fun with fractions
Whiteboard Subtraction
MULTIPLY
Place Value
triangles
100

2/5 x 3/5

6/25

100

6253 - 6242

11


100

6 x 4

24

100

10 x 10

100

100

how many right angles does a right triangle have?

1


200

3/7 x 6/8

18/56

200

563763 - 54836

508927

200

6 x 7

42


200

100 x 1000

100000

200

How many obtuce angles does an obtuce triangle have? 

1

300

5/8 x 6/3

30/24


300

5476444 - 53746

5422698

300

9 x 9

81

300

1000 x 10000

Whiteboard problem

10000000

300

how many acute angles does an equalateral triangle have?

3

400

6/7 x 6/9

36/63

400

65374537 - 38365

65336172

400

2 x 22

44

400

10000 x 10000

Whiteboard problem

100000000

500

0/64533448 x 0/63854873

0

500

64956399 - 539633

64416766

500

10 x 11

110

500

10000 x 1000000

Whiteboard problem

10000000000