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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.

(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...

2.5✘1.6✘1.25 =5

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

(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.

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

4.5÷0.25÷1.6 =4.5÷(0.25x4x0.4) =4.5÷0.4 =11.25 希望能帮到你!

7.2÷1.6+0.8 =4.5+0.8 =5.3

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