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脱式计算下面各题(能简算的要用简便方法计算,并...

①(84×27-2166)÷17,=(2268-2166)÷17,=102÷17,=6;②115×3.7+5.3÷511+2.2,=2.2×3.7+5.3×2.2+2.2,=2.2×(3.7+5.3+1),=2.2×10,=22;③(0.75÷3-0.1)×(1-23),=(0.25-0.1)×13,=0.15×13,=0.05.

3.5*9.8 =3.5*(10-0.2) =3.5*10-3.5*0.2 =35-0.7 =34.3

a-b-c的脱式计算计算用简便方法计算,下面各题用字母表示出来 a-b-c =a-(b+c) 答

我会,但现在的人太坏了,答了又不采纳

用计算机

(1)713×34+34×613=(713+613)×34=1×34=34;(2)37÷711+47÷711=37×117+47×117=(37+47)×117=1×117=117;(3)36×(79+56)=36×79+36×56=28+30=58;(4)120×(1-25%-40%)=120×(0.75-40%)=120×0.35=42;(5)(48÷60%)÷10=80÷10=8.

(1)495÷55+495÷45=9+11=20(2)3.3×34+0.75×5710+75%=3.3×0.75+5.7×0.75+0.75=(3.3+5.7+1)×0.75=10×0.75=7.5(3)12345432155555×55555×614=11111×111115×11111×5×11111×254=14(4)[16.5×7.2÷557×(12.5%-18)]×1519=[16.5×7.2×755×(18-18...

(1)70.08-1.25-1.75,=70.08-(1.25+1.75),=70.08-3,=67.08;(2)4.6+2.89+5.4+3.11,=(4.6+5.4)+(2.89+3.11),=10+6,=16;(3)22×101,=22×100+22×1,=2200+22,=2222;(4)45×36+54×36+36,=(45+54+1)×36,=100×36,=3600;(...

2.5×0.32×125 =(2.5×0.4)×(0.8×125) =1×100 =100 907×99+907 =907×(99+1) =907×100 =90700 (1/3+1/4+1/5)×60 =(1/3)×60+(1/4)×60+(1/5)×60 =20+15+12 =47 [(1/7)-(1/9)]×63-(2/3) =(1/7)×63-(1/9)×63-(2/3) =9-7-(2/3) =1又1/3 (3/5)×[(2/8...

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