简便计算.①31.7﹣0.5×0.7﹣1.65②35.72﹣4.9﹣(5.72+5.1)③111﹣3.67×2.8﹣3.67×7.2④12.5×6.3+27×1.25+0.125÷0.01.
14.8×6.3-6.3×6.5+8.3×3.7 18.1+(3-0.299÷0.23)×1
5.09-(0.09+1.23) 9.36-(4.36-3.5)
7.5-2.45+7.5+2.45 (-)×21+
2.5×(1.92÷0.3-5.9) 24.5-(7.58+)
45.55-(6.82+15.55) 34.52-17.87-12.23