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99x78十33x66的巧算

原式=99*78+33*3*22=99*78+99*22=99*(78+22)=99*100=9900

99x78+33x66=99x78+33x3x22=99x78+99x22=99x(78-22)=99x100=9900

99*78+33*66 =99*(78+22) =99*100 =9900 你好,本题已解答,如果满意 请点右上角“采纳答案”.

99x78+33x66=3x33x78+33x3x22=3x33x(78+22)=99x100=9900

99*78+33*66=99*78+99*22=99*(78+22)=99*100=9900

99x78十33x66=99*78+33*3*22(分解质因数)=99*78+99*22=99*(78+22)(乘法结合律)=99*100=9900

99x78+33x66=99x(78+66÷3)=99x100=9900

99x78=(100-1)x78=100x78-1x78=7800-78=7722;33x66=33x3x22=99x22=(100-1)x22=100x22-22=2200-22=2178.谢谢采纳!

99x18十33x66=33*13*3+33*66=33*39+33*66=33*(39+66)=33*105=3465

=33*3*78+33*66=33*234+33*66=33*(234+66)=33*300=9900

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