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99x43+43简便算法

99x43+43 =(99+1)x43 =100×43 =4300

可以把后面的当成是1X43,这样子就容易理解简便方法了 99X43+43 =(99x43).+(1x43) =(99+1)x43 =100x43 =4300

43x2+99x43-43 =43x(2+99-1) =43x100 =4300

100x82一qq

原式 =99x64+1x64 =(99+1)x64 =100x64 =6400

(43x98+39)÷(99x43-4) =(43x98+39)÷(98x43+43-4) =(43x98+39)÷(98x43+39) =1

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