4又8/25-7/15×3/5÷7/45
=4又8/25-7/25÷7/45
=4又8/25-1又4/5
=2又13/25
(1-8/15*3/4)÷3/5
=(1-2/5)÷3/5
=3/5÷3/5
=1
(21+7/15)/(7/5)
=21*5/7+(7/15)*(5/7)
=15+1/3
=46/3
(21-7/15)/(7/5)
=21*5/7-(7/15)*(5/7)
=15-1/3
=44/3
14/5÷(14/5+7/10)
=14÷(14+7/2)
=14÷35/2
=4/7
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5.4×5分之3-13.6÷3分之5+0.6
=5.4×5分之3-13.6×5分之3+5分之3
=5分之3×(5.4-13.6+1)
=5分之3×(-7.2)
=0.6×(-7.2)
=-4.32
5.4×5分之3+13.6÷3分之5+0.6
=5.4×5分之3+13.6×5分之3+5分之3
=5分之3×(5.4+13.6+1)
=5分之3×20
=12
把又字前面的提出来,分数通分,就简单了
12×9分之七除以五分之3-2分之1×70的简便运算
12×9分之七除以五分之3-2分之1×70
=12*7/9÷(3/5-1/2)*70
=28/3*10*70
=19600/3
(五分之四+四分之一)除以三分之七加十分之三
=21/20×3/7+3/10
=9/20+6/20
=3/4(即4分之3)
5分之4-5分之4×6分之1
=5分之4×(1-6分之1)
=5分之4×6分之5
=6分之4
=3分之2
4/15×5/3×9/7=4/7