Question

计算0.1*0.2*0.9+0.2*0.6*1.8+0.3*0.9*2.7除以0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2

Answer 1

0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.7除以0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2
= (0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.7)/(0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2)
分子分母同乘以1000：
= (1*32*9+2*6*18+3*9*27)/(1*2*4+2*4*8+3*6*12)
= 【(1*3*9)*(1+2+3)】/【1*2*4*(1+2+3)】
= 【3*9】/【2*4】
= 27/8

Answer 2

0.1*0.2*0.9+0.2*0.4*1.8+0.3*0.6*2.7除以0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2
=1*2*9+2*4*18+3*6*27除以1*2*4+2*4*8+3*6*12
=1*2*9+1*2*9*2*2*2+1*2*9*3*3*3除以1*2*4+1*2*4*2*2*2+1*2*4*3*3*3
=1*2*9(1+8+27)除以1*2*4(1+8+27)
=1*2*9除以1*2*4=9/4

希望能帮到你 祝你好运

Answer 3

0.1*0.2*0.9+0.2*0.6*1.8+0.3*0.9*2.7除以0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2
=0.9*（0.02+0.24+0.81）/【0.4*（0.02+0.16+0.54）】
=9*107/4*72
=107/32