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请用简便方法计算下面各题。1340*3.4+660*8.2+1.34*2300+134*54+0.66*290015.37*7.88-9.37*7.88-15.37*2.12+9.37*2.124.65*32+2.5*46.5+0.465*430
题目详情
请用简便方法计算下面各题。
1340*3.4+660*8.2+1.34*2300+134*54+0.66*2900 15.37*7.88-9.37*7.88-15.37*2.12+9.37*2.12 4.65*32+2.5*46.5+0.465*430
1340*3.4+660*8.2+1.34*2300+134*54+0.66*2900 15.37*7.88-9.37*7.88-15.37*2.12+9.37*2.12 4.65*32+2.5*46.5+0.465*430
▼优质解答
答案和解析
1340*3.4+660*8.2+1.34*2300+134*54+0.66*2900 =134*(34+23+54)+66*(82+29) =134*111+66*111 =200*111=22200 15.37*7.88-9.37*7.88-15.37*2.12+9.37*2.12 =7.88*6+2.12*6 =60 4.65*32+2.5*46.5+0.465*430 =4.65*(32+25+43) =4.65*100=465
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