CDF CLASS 7th

For a ................ on number line, we move towards right of zero.

• negative integer

• positive integer

• 0

• none

For a ................ on number line, we move towards left of zero.

• negative integer

• positive integer

• 0

• none

Integers are closed under ...........

• addition only

• subtraction only

• addition, subtraction and multiplication

• multiplication only

............................ are commutative for integers.

• Addition only

• multiplication only

• division

• Addition and multiplication

............................ are associative for integers.

• Addition only

• multiplication only

• division

• Addition and multiplication

If a, b and c are integers then ............

• (a - b) + c = a + (b - c)

• (a + b) + c = a + (b + c)

• (a - b) - c = a - (b - c)

• none

.................is called additive identity.

• '1'

• '0'

• '2'

• '3'

a ÷ a =

• a

• 0

• 1

• none

a ÷ 1 =

• a

• 0

• 1

• none

0 ÷ a =

• a

• 0

• 1

• not defined