怎样算简便就怎样算.
267﹣67×3 87×99+87 1.27+3.9+0.73+16.1
15.17﹣6.8﹣3.2 12.75﹣(6.8+2.75) 3.25+1.83﹣0.25+4.17.
怎样算简便就怎样算.
267﹣67×3 87×99+87 1.27+3.9+0.73+16.1
15.17﹣6.8﹣3.2 12.75﹣(6.8+2.75) 3.25+1.83﹣0.25+4.17.