计算下面各题,能简算的要简算。谢谢了
2个回答
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3.6*(5/6-5/9)
=3.6*5/6-3.6*5/9
=3-2
=1
5/12*11+5/12
=5/12*(11+1)
=5/12*12
=5
55*3/56
=(56-1)*3/56
=56*3/56-1*3/56
=3-3/56
=2又53/56
20*(4/5+9/10)
=20*4/5+20*9/10
=16+18
=34
1/3+7/5*7/5
=1/3+1
=4/3
13*(2-1/65)
=13*2-13*1/65
=26-1/5
=15又4/5
=3.6*5/6-3.6*5/9
=3-2
=1
5/12*11+5/12
=5/12*(11+1)
=5/12*12
=5
55*3/56
=(56-1)*3/56
=56*3/56-1*3/56
=3-3/56
=2又53/56
20*(4/5+9/10)
=20*4/5+20*9/10
=16+18
=34
1/3+7/5*7/5
=1/3+1
=4/3
13*(2-1/65)
=13*2-13*1/65
=26-1/5
=15又4/5
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