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33*103*0.1怎么简便运算

0.45x10.2 +7.05x1.33+1.33x2.95 =0.45×(10+0.2)+1.33×(7.05+2.95) =0.45×10+0.45×0.2+1.33×10 =4.5+0.09+13.3 =4.59+13.3 =17.89

(1)0.8×33×1.25,=0.8×1.25×33,=1×33,=33;(2)1718×910+1718÷10,=1718×(910+110),=1718×1,=1718;(3)3?59×720?1136,=3-(736+1136),=3-12,=2.5;(4)7.2×9.9,=7.2×10-7.2×0.1,=72-0.72,=71.28.

9和33同时约掉3变成11*13分之8*4+4*3等于56/143

7.5+4.9 =7.4+0.1+4.9 =7.4+(0.1+4.9) =7.4+5 =12.4

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