Question

1.25*32*25 用简便计算 x÷6.4=1.6 8.836÷x=0.047

Answer 1

1.25*32*25

=1.25*8*4*25

=(1.25*8)(4*25)

=10x100

=1000

x÷6.4=1.6

x=1.6*6.4

x=0.2*8*8*8*0.1

x=10.24

8.836÷x=0.047

x=8.836÷0.047

x=8836÷47

x=188