递等式计算:(能简便计算的用简便方法计算)(1)3.6×1.25+0.32÷0.4(2)0.45×78.2+20.8×0.45+0.45(3)14.5+27.3+12.7+45.5(4)(0.25+0.125)÷(0.75×0.4)(5)6500÷0.125÷0.8(6)[(3.8﹣2.5)×0.4﹣0.1]÷0.04.
下面各题,怎样算简便就怎样算. 2007+2007×99 1.5×[0.02÷(2.1﹣2.09)]×125××8 21×+48×12.5%+11×.
怎样算简便就怎样算.×+×4.05﹣2.8﹣2.712×(+﹣)
用简便方法计算,要写出简算过程. (1)(2).
20×(17×5)
12×15+12×35.