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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

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)2.9+0.46+7.1+0.54,=(2.9+7.1)+(0.46+0.56),=10+1,=11;(2)30÷2.5+1.6×2.5,=12+4,=16;(3)0.4×(25+2.5),=25×0.4+2.5×0.4,=10+1,=11;(4)4.97×[2.46÷(5.58-5.28)],=4.97×[2.46÷0.3],=4.97×8.2,=40.754.

(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)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...

①5.27-1.98-0.02 =5.27-(1.98+0.02)=5.27-2=3.27; ②3.2×5.7+6.8×5.7=(3.2+6.8)×5.7=10×5.7=57;③2.5×6.8×0.4=(2.5×0.4)×6.8=1×6.8=6.8;④5.6-36÷30=5.6-1.2=4.4;⑤0.72+9.6÷3.2=0.72+3=3.72;⑥7.75×[20÷(3.24-3.04)]=7.75×[20÷0.2]=7.7...

需要先通分: 5/12 = 10/24 1/6 = 4/24 3/8 = 9/24 所以: 5/12+1/6+3/8 = 10/24+4/24+9/24 = 23/24

(1)68×35-408÷24=2380-17=2363;(2)57+98×79+18=57+(78+18)=57+1=157;(3)(0.63-0.63÷3)×0.5=(0.63-0.21)×0.5=0.42×0.5=0.21;(4)3.64×0.25+4.36×0.25=(3.64+4.36)×0.25=8×0.25=2;(5)1.3-3.79+9.7-6.21=1.3+9.7-(3.79+6.21...

(1)12.25-3.1+0.85-6.17,=(12.25+0.85)-3.1-6.17,=13.1-3.1-6.17,=3.83;(2)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(3)3.6÷(1.2+0.5)×5,=3.6÷1.7×5,=3617×5,=101017; (4)0.125×0.38×80,=(0.125×80)×0.38...

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