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计算下面各题,能简算的要用简便方法计算.(1)0....

(1)0.75×99+0.75=0.75×(99+1),=75;(2)56-(23-16)=56+16-23,=13;(3)(8.5-4)×(0.32÷1.6)=4.5×0.2,=0.9;(4)56×[1÷(78?34)]=56×[1÷18],=56×8,=203;(5)0.925×17+9.25×8.3=9.25×1.7+9.25×8.3,=9.25×(1.7+8.3),=9.25×10...

(1)1.08×0.8÷0.27=(1.08÷0.27)×0.8=4×0.8=3.2(2)10.01×101-10.01=10.01×(101-1)=10.01×100=1001(3)0.8×(12.5+0.125)=0.8×12.5+0.8×0.125=10+0.1=10.1(4)2.46÷0.82+33.6=3+33.6=36.6

①2.9+0.46+7.1+0.54=(2.9+7.1)+(0.46+0.54)=10+1=11;②(31.6-11.7)÷2.5÷0.4=19.9÷(2.5×0.4)=19.9÷1=19.9;③0.4×37×25=37×(0.4×25)=37×10=370;④4.97÷1.25+3.03×8=4.97÷108+3.03×8=0.497×8+3.03×8=(0.497+3.03)×8=3.527×8=28.216.

(1)0.85×58+0.85÷223,=0.85×58+0.85×38,=(58+38)×0.85,=1×0.85,=0.85;(2)4.72-49+3.28-59,=(4.72+3.28)-(49+59),=8-1,=7;(3)[1-(12-13)]×2425,=[1-(36-26)]×2425,=[1-16]×2425,=56×2425,=45;(4)9697×96,=9697×...

(1)0.8×3.9×1.25=0.8×1.25×3.9=1×3.9=3.9;(2)3.6×10.1=3.6×(10+0.1)=3.6×10+3.6×0.1=36+0.36=36.36;(3)4.8×1.25=6×0.8×1.25=6×(0.8×1.25)=6×1=6;(4)4.87×2.34+48.7×0.266=4.87×2.34+4.87×2.66=4.87×(2.34+2.66)=4.87×5=24.35.

(1)原式=17.92-7.92-0.3 =10-0.3 =9.7 (2)原式=210÷(14×5) =210÷70 =3 (3)原式= × + × =( + )× = (4)原式= ÷( × ) = ×5 =

(1)0.25×8.75×4,=0.25×4×8.75,=100×8.75,=875;(2)25.8×7+3×25.8,=25.8×(7+3),=25.8×10,=258;(3)10÷0.2÷2.5,=10÷(0.2×2.5),=10÷0.5,=20;(4)21.36÷0.8-12.9,=26.7-12.9,=13.8.

(1)1.36+4.85+2.64+6.15,=(1.36+2.64)+(4.85+6.15),=4+11,=15;(2)98.5÷2.5÷4,=98.5÷(2.5×4),=98.5÷10,=9.85;(3)5.4÷[2.5×(3.7-2.9)],=5.4÷[2.5×0.8],=5.4÷2,=2.7;(4)0.8×(4-3.68)÷0.01,=0.8×0.32÷0.01,=0.256÷0...

①24×25+76×25 =(24+76)×25=100×25=40 ②6.4-0.45+3.6-0.55=(6.4+3.6)-(0.45+0.55)=10-1=9③(512+14-13)×12 =512×12+14×12-13×12=5+3-4=4 ④0.25×1.25×8=0.25×(1.25×8)=0.25×10=2.5故答案为:25,3.6,0.55,12,8.

(1)4.2×(6.18-3.03)+6.3,=4.2×3.15+6.3,=13.23+6.3,=19.53;(2)15.02-6.8-(1.02+1.2),=15.02-6.8-1.02-1.2,=(15.02-1.02)-(6.8+1.2),=14-8,=6;(3)0.6×[(5-0.68)÷1.2],=0.6×[4.32÷1.2],=0.6×3.6,=2.16;(4)2.7÷4+6...

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