MENTAL MATHS

3 + 80

• 83

• 38

• 43

12 + 5 = 5 +

• 12

• 11

• 5

6 x ( 8 x 9 ) = ( 6 x 9 ) x ___

• 6

• 54

• 8

The successor of 19 is ___

• 18

• 20

• 19

length = 12 m breadth = 11 Area =

• 132 sq.m

• 131 sq.m

• 132 m

1 km = _____ m

• 100

• 1000

• 10

( -2 ) + 2

• 4

• -4

• 0

23 - ( - 23 )

• 0

• 46

• 44

Perimeter of rectangle is

• 2 ( l + b )

• 2 + l x b

• 2 + l

Area of square is

• side + side

• side x side

• length - breadth