能简算的用简便方法计算.(写出主要简便过程,无过程不得分)①1.6×3.9×1.25 ②4.87×2.34+48.7×0.266 ③0.05×0.7×20×1.7④2.5×3.2×12.5 ⑤3.95×7.6+3.95×3.4﹣3.95 ⑥0.49×9.9.
4.625+6.25+3+= .
计算:+45.6×+53.4×= .
在横线内填上合适的数,使各题能用简便方法计算.10﹣﹣ (+)× .
187×5÷187×5= .
计算:2012×4.5+201.2×35+20.12×150+2.012×500= .