Question

Perform the operation. Enter your answer in scientific notation.   9 × 102 − 5.6 × 102 =

Answer 1

1489.2

Explanation:

9*102-5.6*102=

102(9+5.6) =

102(9.0+5.6) =

102(14.6) =

102*14.6=

14.6*(100+2) =

(14.6*100+14.6*2) =

(1460+(14+.6) *2) =

1460+(28+1.2) =

1460+(28.0+1.2) =

1460+29.2=

1460.0+

29.2

=1489.2

Answer 2

`9* 10^2-5.6* 10^2=3.4* 10^2`

Explanation:

Given : Operation
`9* 10^2-5.6* 10^2`

To find : Perform the operation ?

Solution :

Operation
`9* 10^2-5.6* 10^2`

Taking
`10^2` common,

`=9* 10^2-5.6* 10^2`

`=10^2* (9-5.6)`

`=10^2* (3.4)`

`=3.4* 10^2`

Therefore,
`9* 10^2-5.6* 10^2=3.4* 10^2`