Question

can any tell how to do it​

Answer 1

1.6*10^15=16×10^4

now taking 10^14 common

ans=(16-5)×10^14

=11×10^14.

=1.1×10^15...hope it helps

Answer 2

you can write it as

1.6×10^15-0.5×10^15=1.1×10^15