计算:347×69+653×31+306×19=_.
问题描述:
计算:347×69+653×31+306×19=______.
答
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....