口算.23.4÷10= 10÷4= 6.6÷6= 3.6÷3=0.25×4= 400÷50= 2.4+2= 6.4﹣5.6=
用简便方法计算 ①7350÷25 ②54×101 ③227+364+146+173 ④5604﹣(723+1604)
0.279×258+0.742×279 13÷28+11÷27+15÷28+38÷27.
用简便方法计算下面各题. 573﹣298194+501627﹣(427+189) 630÷14125×25×32210÷6÷5.
怎样简便就怎样计算. (+)×24×153.7×+5.3×0.75+. 9.9+99.9+999.96.8÷4﹣1.2×25%+4×0.25.
0.34×12.5+0.125×66=103×0.3=4.34÷0.25÷4= 130130÷11111×66666=40.5×1.1﹣4.05=100﹣98+96﹣94…+4﹣2=