怎样简便就怎样算:5/6*11加5/6 120+290/58*16 (2/3-2/5)*(1/8+1/12) 9/8/【3/4-(7/16-1/4)】
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怎样简便就怎样算:5/6*11加5/6 120+290/58*16 (2/3-2/5)*(1/8+1/12) 9/8/【3/4-(7/16-1/4)】
怎样简便就怎样算:5/6*11加5/6 120+290/58*16 (2/3-2/5)*(1/8+1/12) 9/8/【3/4-(7/16-1/4)】
怎样简便就怎样算:5/6*11加5/6 120+290/58*16 (2/3-2/5)*(1/8+1/12) 9/8/【3/4-(7/16-1/4)】
5/6*11加5/6
=5/6(11+1)
=12×5/6
=10
120+290/58*16
=120+5×58÷58×16
=120+5×16
=120+80
=200
(2/3-2/5)*(1/8+1/12)
=(1/3-1/5)×2×(1/8+1/12)
=(5/15-3/15)×(1/4+1/6)
=2/15×(1/4+1/6)
=1/15(1/2+1/3)
=1/15×5/6
=1/18
9/8/【3/4-(7/16-1/4)】
=9/8÷(3/4+1/4-7/16)
=9/8÷(1-7/16)
=9/8÷9/16
=2
5/6×11+5/6 120+290/58×16 (2/3-2/5)×(1/8+1/12)
55=5/6×(11+1) =120+(290/29×1/2)×16 =(2/3-2/5)×1/8+(2/3-2/5)×1/12
=5/6×12 ...
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5/6×11+5/6 120+290/58×16 (2/3-2/5)×(1/8+1/12)
55=5/6×(11+1) =120+(290/29×1/2)×16 =(2/3-2/5)×1/8+(2/3-2/5)×1/12
=5/6×12 =120+10×1/2×16 =2/3×1/8-2/5×1/8+2/3×1/12-2/5×1/12
=10 =120+80 =1/12-1/20+1/18-1/30
乘法分配律 =200 =(1/12+1/18)-(1/20+1/30)
=1/18
把2/3-2/5看成一个整体,用乘法分配律
9/8/【3/4-(7/16-1/4)】
=9/8/【3/4-7/16+1/4】
=9/8/【3/4+1/4-7/16】
=9/8/(9/16)
=9/8×16/9
=2
除法没有分配率(⊙o⊙)哦
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