5.9×10.1简便运算
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99*77+77=100*77=770051.27+1.64+18.63=(51.27+18.63)+1.64=69.9+1.64=71.54这题你的题目没写错吧.
7.9÷0.25=7.9×4÷(0.25×4)=7.9×4÷1=(8-0.1)×4=8×4-0.1×4=32-0.4=31.6
1993/[(1993x1994+1993)/1994]=1993/[(1993x1995)/1994]=1993x[1994/(1993x1995)]=1994/1995
7.3×4.5-4.5=(7.3-1)×4.5=6.3×4.5=28.355.9×10.1=5.9×10+5.9×0.1=59+0.59=59.59
4.9×10.1=4.9×(10+0.1)=4.9×10+4.9×0.1=49+0.49=49.49
原式=(10+0.1)X7.5=75+0.75=75.75
=(2减0.1)x4.3=2x4.3减0.1x4.3=8.6减0.43=8.17再答:=(10+0.1)x7.6=10x7.6+7.6x0.1=76+0.76=76.76
3.8x10.1=3.8x(10+0.1)=3.8x10+3.8x0.4=38+0.38=38.38
10.1*1-56-0.156简便运算题目应该是10.1*1.56-0.156吧?!10.1*1.56-0.156=(10+0.1)*1.56-0.156=10*1.56+0.1*1.56-0.156
10.1^2-10.1*2.2+1.21=10.1^2-2*10.1*1.1+1.1^2=(10.1-1.1)^2=9*9=81
(二又七分之三减去一又七分之三)+(九分之四加一又九分之五)=1+2=3
10.1*99+10.1=10.1*(99+1)=10.1*100=1010
78×10.1=78×(10+0.1)=780+7.8=787.8
36.5×0.26+3.65×7.4=36.5×0.26+36.5×0.74=36.5×(0.26+0.74)=36.5×1=36.585×10.1-8.5=8.5×101-8.5=8.5×(101-
(5/6-3/4)÷5/12÷9/5=(5/6-3/4)×12/5×5/9=(5/6-3/4)×4/3=5/6×4/3-3/4×4/3=10/9-1=1/93/7÷[5/7-(3/7+1/5)]=3/
49.5×10.1-49.5×0.1=49.5×(10.1-0.1)=49.5×10=495
(5.9+1.65)除以2.5=7.55÷2.5=(7.55*4)÷(2.5*4)=30.2÷10=3.02√希望你能看懂,你能明白,赞同
10.1+10.01+10.001+10.0001+10.00001=10+0.1+10+0.01+10+0.001+10+0.0001+10+0.00001=50+0.11111=50.11111
解题思路:本题考察有理数的混合计算,可以利用结合律进行简便计算解题过程: