mental math

20 - 13

• 5

• 6

• 7

• 8

How many sides does an octagon have?

• 5

• 6

• 7

• 8

6 x 4

• 22

• 23

• 24

• 26

Which is a multiple of 7 between 20 and 30?

• 21

• 22

• 25

• 27

800 + 6

• 860

• 8006

• 680

• 806

Make 7 ten times bigger

• 56

• 70

• 77

• 49

What is the perimeter of a square if each side measures 4 cm?

• 20 cm

• 16 cm

• 8 cm

• 18 cm

What is 1/2 as a decimal?

• 0.6

• 0.4

• 0.5

• 0.2