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9x55十49的简便方法

=9x55十9x5=9x(55十5)=9x60=540

9*55+49 49=55-6=9*55+55-6=10*55-6=550-6=544懂了么??请您采纳,求采纳.

9*55+49=495+49=544没有合适的简便方法

利用乘法分配律求解即可:原式=49x(99+1)=49x100=4900 望采纳

9*55+49=9x55+55-6=(9+1)x55-6=550-6=544 128*8=128x(10-2)=128x10-128x2=1280-256=1024

9x55+49=9x55+55-6=55x(9+1)-6=55x10-6=550-6=544 亲,请【采纳答案】,您的采纳是我答题的动力,谢谢.

9*55+49=(10-1)*55+49=10*55-(55-49)=550-6=544

9*46+46=460

=(9+1)*48=10*48=480

解:45x9十45等于( 450 ) ∵已知需求出45x9十45等于多少 X * Y + X = X * (Y + 1) ∴45 * 9 + 45 = 45 * (9 + 1) = 45 * 10 = 450 答:45x9十45等于450

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