347×69+653×31+306×19,
=347×(50+19)+653×(50-19)+306×19,
=347×50+347×19+653×50-653×19+306×19,
=(347+653)×50+(347+306-653)×19,
=1000×50+0×19,
=50000.
故答案为:50000.
计算:347×69+653×31+306×19=_.
计算:347×69+653×31+306×19=______.
数学人气:790 ℃时间:2019-09-09 18:09:15
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