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25X9X44简便计算

25×4×11×9=9900

9900

0.44x2.5 =0.11×4×2.5 =0.11×10 =1.1 5.6x9.9 =5.6×(10-0.1) =5.6×10-5.6×0.1 =56-0.56 =55.44 3.2x25x1.25 =4×0.8×25×1.25 =4×25×0.8×1.25 =100×1 =100

=(4×25)×(11×9)

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