下面各题只列式不计算(1)一根电线长100m,用去30%后,还剩多少m?列式:(2)商店运来牛奶120箱,比运来的可乐多20%,运来可乐多少箱?列式:
脱式计算与简便运算= = = = 6﹣×﹣= 〔1﹣(﹣)〕÷= = = 5+3.6×2.5÷0.48= = = = 3.6×2÷16.9÷(3×1.1 6)×1.3= +++…+= .
= ()×12=
546﹣398 457+199 2.2×101 5.4×99+5.4 32×0.125×25 .
计算:的值为多少?
脱式计算,能简便的简便.4.2﹣1.38+5.8﹣3.62 0.125×0.25×322