下面各题,能简算的要简算。
4.82-5.2÷0.8×0.62又7/20÷[5又3/4-4.5﹙20%+1/3﹚76×﹙1/23-1/53﹚+23×﹙1/53+1/76﹚-53×﹙1/23-1/76...
4.82-5.2÷0.8×0.6
2又7/20÷[5又3/4-4.5﹙20%+1/3﹚
76×﹙1/23-1/53﹚+23×﹙1/53+1/76﹚-53×﹙1/23-1/76﹚
20.07×39+200.7×4.1+40×10.035 展开
2又7/20÷[5又3/4-4.5﹙20%+1/3﹚
76×﹙1/23-1/53﹚+23×﹙1/53+1/76﹚-53×﹙1/23-1/76﹚
20.07×39+200.7×4.1+40×10.035 展开
1个回答
2013-06-06 · 知道合伙人教育行家
wangcai3882
知道合伙人教育行家
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解:
4.82-5.2÷0.8×0.6
=4.82-5.2x(0.6/0.8)
=4.82-5.2x3/4
=4.82-3.9
=0.92
2又7/20÷[5又3/4-4.5﹙20%+1/3﹚
=47/20÷(5.75-0.9-1.5)
=2.35÷3.35
=47/67
76×﹙1/23-1/53﹚+23×﹙1/53+1/76﹚-53×﹙1/23-1/76﹚
=76/23-76/53+23/53+23/76-53/23+53/76
=(76/23-53/23)-(76/53-23/53)+(23/76+53/76)
=1-1+1
=1
20.07×39+200.7×4.1+40×10.035
=20.07 ×39+20.07×41+2×10.035×20
=20.07×39+20.07×41+20.07×20
=20.07×(39+41+20)
=20.07×100
=2007
4.82-5.2÷0.8×0.6
=4.82-5.2x(0.6/0.8)
=4.82-5.2x3/4
=4.82-3.9
=0.92
2又7/20÷[5又3/4-4.5﹙20%+1/3﹚
=47/20÷(5.75-0.9-1.5)
=2.35÷3.35
=47/67
76×﹙1/23-1/53﹚+23×﹙1/53+1/76﹚-53×﹙1/23-1/76﹚
=76/23-76/53+23/53+23/76-53/23+53/76
=(76/23-53/23)-(76/53-23/53)+(23/76+53/76)
=1-1+1
=1
20.07×39+200.7×4.1+40×10.035
=20.07 ×39+20.07×41+2×10.035×20
=20.07×39+20.07×41+20.07×20
=20.07×(39+41+20)
=20.07×100
=2007
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