用竖式计算.215÷36 318÷53 196÷28.
直接写得数.33×= ×4÷×4= 3.7+3.7×9= 1.6﹣=16×25%= 5÷×0.7= ×1= +﹣+=11﹣﹣= (+)×24=
直接写得数:3﹣0.07= ×= 7.2÷0.8×9=0.42= 1÷0.01%= =
直接写出得数.+= 10﹣5.75= 7÷0.01= ×= 1.7×5.4×0=54+49+46= 6298÷70= (+)×30= 1×(﹣1÷3)= ﹣×=
直接写出得数.①2﹣= ②0.1÷0.01= ③×= ④+=⑤127+28= ⑥1÷7+= ⑦1.8×0.3= ⑧2.9+4.5=⑨×2÷×2= ⑩0.25×99+0.25= .
简算2500+450÷18×322008×47×(+)×461.25×32×0.25.