直接写出得数.260﹣40= 18÷1.5= 3:6= 1.2:= 13+58= 2.8﹣0.9= 1.6×4= 3.6÷12= 0.57÷0.1= ÷3= 1﹣= =
用简便方法计算.356+201 16.54﹣(6.54+) ÷34+×.
计算下面各题,能简算的要简算.(1)(2)12(3)(4)(5)(6)2.
1+0.5%= 0.8﹣= 0.5﹣= = 365﹣199= = 3×= = =
270×0.4×2×2.5×0.5 95×38+62÷.
口算题= = = 10%+0.9= 7﹣7÷8=7﹣7÷8= 79×99= 4÷7+3÷7= 6.8×= ==