(-191919×9898+989898×1919)÷(-1/2+3.14)=?
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(-191919×9898+989898×1919)÷(-1/2+3.14)=?
(-191919×9898+989898×1919)÷(-1/2+3.14)=?
(-191919×9898+989898×1919)÷(-1/2+3.14)=?
第一个括号内的数字提取公约数就出来了
=(-19*10101*98*101+98*10101*19*101)/(-1/2+3.14)
=98*10101*101(-19+19)/(-1/2+3.14)
=0