Question

简便运算：12.5*(8-0.8).2.7*4.3+5.7*2.7.0..77*99.6.18*9.9+0.618.0.

Answer 1

12.5*(8-0.8)

=12.5*8-12.5*0.8

=100-10

=90

2.7*4.3+5.7*2.7

=2.7*（4.3+5.7）

=2.7*10

=27

0.77*99

=0.77*100-0.77

=77-0.77

=76.23

6.18*9.9+0.618

=0.618*99+0.618

=0.618*（99+1）

=0.618*100

=61.8

0.25*1.25*0.8*40

=（0.25*40）*（1.25*0.8）

=10*1

=10