Question

递等式计算能巧算的要巧算 0.8*(4-3.75)/0.1 4.8*1.25*0.25 9.5*4.8-4.8*5 14

Answer 1

0.8*(4-3.75)/0.1

=8*0.25

=2

4.8*1.25*0.25

=6*（0.8*1.25）*0.25

=1*1.5

=1.5

9.5*4.8-4.8*5

=4.8*（9.5-5）

=4.8*4.5

=（5-0.2）*4.5

=5*4.5-0.2*4.5

=22.5-0.9

=21.6

14.75/8/1.25

=14.75/（8*1.25）

=14.75/10

=1.475