Mental Math Strategies

0.1 is equivalent to...

• 0.01

• 0.10

• 0.001

0.500 is equivalent to...

• 0.5

• 0.05

• 0.005

3/10 is equivalent to...

• 0.03

• 0.003

• 0.3

1.4 =

• 1 + 0.4

• 1 + 0.04

• 1 + 0.004

7 x 30 =

• 21

• 210

• 2100

24 x 20 =

• 48

• 480

• 4800

16 x 200 =

• 4,800

• 3,200

• 2,400

0.70 doubled =

• 0.210

• 1.40

• 2.10

1.4 doubled =

• 2.4

• 2.8

• 3.4

• 3.8

0.27 is equivalent to...

• 27/10

• 27/1000

• 270/1000