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脱式计算(能简便算的要简便算) ...

(1)0.27+0.27×0.37+0.27×0.63=0.27×(1+0.37+0.63)=0.27×2=0.54(2)12.5×4×2.5×16=(12.5×8×2)×(4×2.5)=200×10=2000(3)9.68×101=9.68×(100+1)=9.68×100+9.68=968+9.68=977.68 (4)9.6÷(9.6×4)=9.6÷9.6÷4=1÷4=0.25(5)0.78÷0.25÷4...

(1)0.01+1.01×99,=0.01+1.01×(100-1),=0.01+1.01×100-1.01×1,=101+0.01-1.01,=100;(2)26×20.2-8.4-1.8,=26×(20+0.2)-(8.4+1.8),=520+5.2-10.2,=525.2-10.2,=515;(3)89.3×43+38×89.3+893×1.9,=89.3×43+38×89.3+89.3×19,...

3.8*0.25+2.05=1.9*2*0.25+2.05=1.9*0.5+2.05=0.95+2.05=3 1.25*99=1.25*(100-1)=1.25*100-1.25=125-1.25=123.75

(1)13.6×3-40.6÷2,=40.8-20.3,=20.5;(2) 99×0.75+ 1 4 ×99 ,=99×(0.75+0.25),=99×1,=99;(3) ( 5 6 - 5 8 )×24 ,= 5 6 ×24- 5 8 ×24,=20-15,=5;(4) 121×100 1 121 ,=121×(100+ 1 121 ),=121×100+121× 1 121 ,=12100+1...

3.12×0.13÷3.12 =3.12÷3.12×0.13 =1×0.13 =0.13

①11.23-3.4+8.77-6.6=11.23+8.77-(3.4+6.6)=20-10=10;②5.4÷[0.68÷(1.2-1.03)]=5.4÷[0.68÷0.17]=5.4÷4=1.35;③(3.24×99+3.24)÷8.1 =[3.24×(99+1)]÷8.1=324÷8.1=40;④(18.4-3.75)÷12.5÷0.8=14.65÷12.5÷0.8=14.65÷(12.5×0.8)=14.65÷10...

(8/9-1/3)÷(7/18×2/3) =(8/9-1/3)÷7/27 =8/9×27/7-1/3×27/7 =24/7-9/7 =15/7 =2又1/7

(1)62×7.1+2.9,=440.2+2.9,=443.1;(2)4.2×0.25,=(4+0.2)×0.25,=4×0.25+0.2×0.25,=1+0.05,=1.05;(3)5.2×4.3+0.8×4.3,=(5.2+0.8)×4.3,=6×4.3,=25.8.

396X123=(400一4)x123=49200一492=48708 3.96X12.3=(14-0.04)12.3=49.2-0.492=48.708 68+44+32=68+32+44=100+44=144 125X764X8=125X8X764=1000x764=764000 1.25X76.4X0.8=1.25X0.8X76.4=1.25X0.8x76.4=1X76.4=76.4 99X38=(100-1)X38=3800-38=376...

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