Mental math

70 x80

• 100

• 5600

• 3

• 210

• 760

80-20

• 30

• 40

• 60

• 20

Difference between 98 and 68

• 90

• 70

• 30

• 80

50+50

• 12

• 190

• 100

• 40

78-20

• 70

• 20

• 78

• 58

9+4=

7 x 7 =

• 64

• 49

• 36

• 56

12 x 12 =

• 110

• 132

• 144

• 24

How many sides does a pentagon have?

• 4

• 5

• 6

• 8

Look at the numbersin the screen . Write the next two numbers .

5 - 7 - 9 - 11 ___ , ___

• 13 - 15

• 12 - 13

• 15 - 16

• 11 - 12