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199×99+99简便计算

199+99*99 =100+99+99*99 =100+99*(1+99) =100+99*100 =100+9900 =10000

99*99+199 =99x99+99+100 =99x(99+1)+100 =99x100+100 =100x(99+1) =100x100 =10000 亲,请【采纳答案】,您的采纳是我答题的动力,谢谢。

99乘99加199 =99*99+199 =99*99+99+100 =99*(99+1)+100 =99*100+100 =(99+1)8100 =100*100 =10000

99x99+199 =99x99+99+100 =99x(99+1)+100 =99x100+100 =100x(99+1) =100x100 =10000

199×99+99 =99(199+1) =99*200 =(100-1)*200 =20000-200 =19800

用简便方法计算: 99×99+199 =99✘(100-1)+199 =99✘100-99✘1+199 =9900-99+199 =10000 999×999+1999 =999✘(1000-1)+1999 =999✘1000-999✘1+1999 =999000-999+1999 =1000000

99×100+199-99 =9900+100 =10000

99*99+199=99^2+2*99*1+1=(99+1)^2=10000

99×99+199用简便的方法计算: =99×99+99+100 =99×(99+1)+100 =99×100+100 =100×(99+1) =100×100 =10000 “凑整巧算”——运用加法的交换律、结合律进行计算。 1、凑整,特别是“凑十”、“凑百”、“凑千”等,是加减法速算的重要方法。 2、加法交换律...

原式=(100-1)x99+100+99 =100x99+100+(99-99) =9900+100 =10000

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