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脱式计算(能简算的要简算,没简算的不给分).1.6...

(1)1.6×55.4-55.4×0.6-55.4,=(1.6-0.6-1)×55.4,=0×55.4,=0;(2)17.68÷5.2+2.7×1.5,=3.4+4.05,=7.45;(3)4.8×0.25,=(1.2×4)×0.25,=1.2×(4×0.25),=1.2×1,=1.2.

①125×45×16 =(125×8)×(45×2)=1000×90=90000②0.4÷23+1.6÷23 =(0.4+1.6)×32=2×32=3 ③45×27+15÷321 =45×27+15×7=835+4935=5735 ④5.6×38+0.375×5.4-37.5% =5.6×0.375+0.375×5.4-0.375=0.375×(5.6+5.4-1)=0.375×10=3.75 ⑤21-(37+13)×516=21...

4.8×5.4÷1.6÷2.7 =(4.8÷1.6)x(5.4÷2.7) =3x2 =6

3.17+ 0.83x1.6 =3.17+1.328 =4.498 没有简便方法,直接算

2.5✘1.6✘1.25 =5

(1)(18.6-18.6÷3.1)×1.6,=(18.6-6)×1.6,=12.6×1.6,=20.16,(2)12.5×2.5×3.2,=(12.5×8)×(2.5×0.4),=100×1,=100,(3)4.5÷18=0.25,(4)32.9×0.46+5.4×3.29,=3.29×(4.6+5.4),=3.29×10,=32.9.

2/7x1.6÷(10-7/8÷3/16) =2/7x1.6÷(10-14/3) =2/7x1.6÷16/3 =2/7x3/10 =3/35

①8.09×1.4-1.6=11.326-1.6=9.726②3.76×0.25+25.8=0.94+25.8=26.74③3.7×6.3+3.7×3.7=3.7×(6.3+3.7)=3.7×10=37④7.3×101-7.3=7.3×(101-1)=7.3×100=730⑤0.125×(8+1.6)=0.125×8×(1+0.2)=1×1.2=1.2⑥0.49×199+0.49=0.49×(199+1)=0.49×200=98⑦...

1.6×2.5×7.5 =0.8x2x2.5x7.5 =0.8x2.5x(2x7.5) =2x15 =30 谢谢,请采纳

(1)16-65+8.4-45,=16-1.2+8.4-0.8,=(16+8.4)-(1.2+0.8),=24.4-2,=22.4;(2)1.25×32×2.5,=1.25×8×4×2.5,=(1.25×8)×(4×2.5),=10×10,=100;(3)2345×19+23×2645,=2345×19+2345×26,=2345×(19+26),=2345×45,=23;(4)82×...

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