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7/8×0.375+3/8÷8/9简便计算

7/8×0.375+3/8÷8/9 =7/8×3/8+3/8×9/8 =(7/8+9/8)×3/8 =2×3/8 =3/4

=8分之7一8分之3 =8分之4 =2分之1

8分之7乘以0.375加8分之3除以九分之8 =8分之7乘以8分之3加8分之3乘以8分之9 =8分之3乘以(8分之9+8分之7) =8分之3乘以2 =4分之3 =0.75

=3/8*(3/10+1)+7/10*3/8 =3/8*(3/10+1+7/10) =3/8*2 =3/4

5.5545418

望采纳

解: 0.375:7/8 =3/8:7/8 =3:7 所以0.375比8分之7化简比是3:7.

解: 原式 =1/8-3/4+3/8+2/9-9/4+(1/3+5/2-7/6)^2 =1/8+3/8-3/4-9/4+2/9+(2/6+15/6-7/6)^2 =2/4-3/4-9/4+2/9+(10/6)^2 =-5/2+2/9+(5/3)^2 =-45/18+4/18+25/9 =-41/18+50/18 =9/18 =1/2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 祝你学习进步,更...

3/8-0.375x3/7 =3/8 - (0.5-0.125)x3/7 =3/8-(1/2 - 1/8)x3/7 =3/8-1/2x3/7+1/8x3/7 =3/8+1/8x3/7-1/2x3/7 =3/8(1+1/7)-1/2x3/7 =3/8x8/7 - 1/2x3/7 =3/7-1/2x3/7 =3/7x(1-1/2) =3/7x1/2 =3/14

3/8-0.375×4/7-37.5%×3/7 =0.375-0.375×4/7-0.375×3/7 =0.375×(1-4/7-3/7) =0.375×0 =0

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