6.25乘以零点二五六加上八分之五乘以三点四加上五乘以八分之一
6.25乘以零点二五六加上八分之五乘以三点四加上五乘以八分之一
6.25×0.56+5/8×3.4+5×1/8
=0.625×5.6+0.625×3.4+0.625
=0.625×(5.6+3.4+1)
=0.625×10
=6.25
七十七点五乘以八分之一加上零点二五乘以一点二五咋简算
七十七点五乘以八分之一加上零点二五乘以一点二五
=77.5x0.125+0.25x1.25
=77.5x0.125+2.5x0.125
=(77.5+2.5)x0.125
=80x0.125
=10
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99乘以八分之五减零点625乘以68加六点二五乘以零点一
99*5/8-0.625*68+6.25*0.1=99*0.625-0.625*68+0.625=(99-68+1)*0.625=32*5/8=20
八分之五乘以三十三减八分之一乘二十五(简算)
解:5/8x33-1/8x5
=1/8x5(33-1)
=5/8x32
=5x4
=20
八分之三乘以95加上五乘以0.375
8分之3×95+5×0.375
=(95+5)×0.375
=100×0.375
=37.5
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八分之一乘78加零点五乘一点二五减730除以八十加24乘以43分之51加51乘以43分
1/8×78+0.5×1.25-730÷80+
=1/8×78+5×1/8-73×1/8
=1/8×(78+5-73)
=1/8×10
=1.25
0.17乘以八分之五乘以二十。
0.17乘以八分之五乘以二十
=0.17x八分之100
=八分之17
=2.125
八分之一乘五加八分之五乘五加八分之一乘十
1/8x5+5/8x5+1/8x10
=5/8x1+5/8x5+5/8x2
=5/8x(1+5+2)
=5/8x8
=5
六分之一乘三十五加六分之五乘十七
=1/6x35+5/6x17
=5/6x7+5/6x17
=5/6x(7+17)
=5/6x24
=20