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数学
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2.63乘3.7+2.63乘6.3 0.99乘0.58 2.5乘4.4 57.4乘3.66-57.4乘2.66怎样简算
人气:236 ℃ 时间:2019-11-24 15:48:44
解答
1、2.63*3.7+2.63*6.3=2.63*(3.7+6.3)=2.63*10=26.3
2、 0.99*0.58=1*0.58-0.01*0.58=0.58-0.0058=0.5742
3、 2.5*4.4 =4*2.5+2.5*0.4=10+1=11
4、57.4*3.66-57.4*2.66=57.4*(3.66-2.66)=57.4*1=57.4
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