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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.

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 =2.5x(1+0.6)x1.25 =(2.5+2.5x0.6)x1.25 =(2.5+1.5)x1.25 =4x1.25 =5

(1)(219-135)×1.6÷(186×17) =2345×1.6÷1867=184225÷1867=64420925;(2)910×67.8+54.3÷119-221×9%=(67.8+54.3-22.1)×90%=100×90%=90;(3)3333×3333+9999×8889+9=9999×1111+9999×8889+9=(1111+8889)×9999+9=10000×9999+9=99990000+9...

解: 2.35*2.6-1.6 =2.35*(2+0.6)-1.6 =4.7+1.41-1.6 =3.1+1.41 =4.51

1.687x58+1.687x42 =1.687x(58+42) =1.687x100 =168.7

g

1. 37.6-1.5/2.4 37.6-0.625 36.975 2.3.6*4/1.6 14.4/1.6 8 2. 3.08*25+3.25*75 3.08*(25+75) 308 3.1.1*0.1+1.1*0.9 1.1*(0.1+0.9) 11 1. 234.5/5.36*0.8 1876/536 3.5( 小时) 2. 2000/7.89*100 25348.5(日元) 3. 13640/6.82 2000(美...

=53.6÷4 =13.4

45%×8.4+1.6×11/20 =9/20×8.4+1.6×11/20 =9/20×(8.4+1.6)+1.6×2/20 =9/20×10-1.6×1/10 =9/2-0.16 =4.5-0.16 =4.34

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