A-A+
正确 合理 灵活地计算.86×485 219-(713-1719)-6135÷[(23+15
问题详情
86×
参考答案
(1)86×485
=(85+1)×485
=85×485+485
=4+485
=4485;
(2)219-(713-1719)-613
=219-713+1719-613
=(219+1719)-(713+613)
=1-1
=0;
(3)5÷[(23+15)×113]
=5÷[1315×113]
=5÷115
=5×15
=75;
(4)932÷[43×(13+14-124-14)]
=932÷[43×(14-14+13-124)]
=932÷[43×724]
=932÷718
=932×187
=81112;
(5)521×813+513×521-521
=521×(813+513-1)
=521×0
=0.
考点: