Question

Without actual multiplication , Evaluate the following:(a) 108square(b) 403square(c) 10.2square

Answer 1

Answer:

a) 108 square

=(100+8) (100+8)

=100*100+100*8+8*100+8*8

=10000+800+800+64

=11664

b) 403 square

=(400+3) (400+3)

=400*400+400*3+3*400+3*3

=1600+120+120+9

=1849

c) 10.2 square

= (10+0.2) (10+0.2)

=10*10+10*0.2+0.2*10+0.2*0.2

=100+2+2+0.04

=104.04