Question

两道题，简便运算谢谢！

Answer 1

追答

请采纳

Answer 2

原式=.0.25*0.4*4*0.2*1.25*3.53
=0.1*1*3.53
=0.353
原式=1.28÷1/8
=1.28*8
=10.24

Answer 3

0.25x3.53x0.2x1.6x1.25
=(0.25x4)x[0.4x(0.2x1.25)]x3.53
=1x(0.4x0.25)x3.53
=0.1x3.53
=0.353
1.28/0.125
=(1.28x8)/(0.125x8)
=1.28x(10-2)
=12.8-2.56
=10.24

Answer 4

0.25X3.53X0.2X1.6X1.25
=0.25X3.53X0.2X2X0.8X1.25
=(0.25X0.2X2)X(1.25X0.8)X3.53
=0.1X1X3.53
=0.353

1.28÷0.125
=(1.28X8)÷(0.125X8)
=10.24÷1
=10.24

Answer 5

原式=(0.25x0.2x1.6x1.25)x3.53
=(0.05x1.6x1.25)x3.53 =[0.05x0.2x(8x1.25)]x3.53
=( 0.05x0.2x10)x3.53=0.01x10x3.53=0.1x3.53=0.3353

原式=1.28x8=10.24

Answer 6

第二条，0.125=1/8

追答

1.28x0.125=1.28÷(1/8)=1.28x8=10.24