帮我一下吧,这些怎么算。
265÷3/4+578×3/4+157÷3/4(5/7+5/9+5/12)÷(1/7+1/9+1/12)3/8×5/11+0.375×2又6/11-3÷3/833÷5/3...
265÷3/4+578×3/4+157÷3/4
(5/7+5/9+5/12)÷(1/7+1/9+1/12)
3/8×5/11+0.375×2又6/11-3÷3/8
33÷5/3+3/5×44+24÷5/3-0.6
能简便就简便计算
x-15%x=6
x-2/7x=3/4
3x=3/8x÷2/7=7/16
x÷6/35=26/45×13/25
x+7/8x=3/4 展开
(5/7+5/9+5/12)÷(1/7+1/9+1/12)
3/8×5/11+0.375×2又6/11-3÷3/8
33÷5/3+3/5×44+24÷5/3-0.6
能简便就简便计算
x-15%x=6
x-2/7x=3/4
3x=3/8x÷2/7=7/16
x÷6/35=26/45×13/25
x+7/8x=3/4 展开
展开全部
(1)原式=265×4/3+578×3/4+157×4/3 =(157+265)×4/3+289×3/2 =422×4/3+289×3/2 =422×8/6+289×9/6 =5977/6 (2)原式=(7×9×12)分 之(5×9×12+5×7×12+5×7×9)乘以(7+9+12)分之(7×9×12) =1275/28 (3)原式=3/8乘5/11+3/8乘28/11-8 =负六又八分之七 (4)原式=33×3/5+44×3/5+24×3/5-3/5 =(33+44+24-1)×3/5=60 (5)X-15%X=6 (6)X-2/7X=3/4 85%X=6 5/7X=3/4 X=120/17 X=21/20 (7)不好意思,没看懂。你那是左边等于中间,还是中间等于右边?还是左右中都等? (8)X÷6/35=26/45×13/25 X=26/45×13/25×6/35 X=676/13125 (9)X+7/8X=3/4 15/8X=3/4 X=2/5
展开全部
(1)原式=265×4/3+578×3/4+157×4/3 =(157+265)×4/3+289×3/2 =422×4/3+289×3/2 =422×8/6+289×9/6 =5977/6 (2)原式=(7×9×12)分 之(5×9×12+5×7×12+5×7×9)乘以(7+9+12)分之(7×9×12) =1275/28 (3)原式=3/8乘5/11+3/8乘28/11-8 =负六又八分之七 (4)原式=33×3/5+44×3/5+24×3/5-3/5 =(33+44+24-1)×3/5=60 (5)X-15%X=6 (6)X-2/7X=3/4 85%X=6 5/7X=3/4 X=120/17 X=21/20 (7) (8)X÷6/35=26/45×13/25 X=26/45×13/25×6/35 X=676/13125 (9)X+7/8X=3/4 15/8X=3/4 X=2/5
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