看图列式。(1) (2)
计算下列各题.(能简算的要简算).91÷2.6÷0.05= 6.3×3.7+6.3×6.3= (3.7+1.7×0.4)÷2.5=7.28+3.2÷2.5= 0.74+0.9×7.4= 7.8÷0.125÷0.8=
计算下面各题,能用简便算法的用简便算法3.045+2.7×6.9= 18.94﹣2.5×4=3.65×2.8+3.65×7.2= 13.54×102﹣2×13.54=
选择合适的方法计算①7.8÷0.26÷0.3 ②5.4+4.6÷0.2 ③1.43×2.5+0.57×2.5 ④10.8÷0.27×4.
计算下面各题,怎样简便就怎样算.(1)45.36÷7.2﹣2.5×0.2 (2)5.12﹣(4.65﹣4.88)(3)2.7÷4+6.3×0.5 (4)9.43×1.1(5)0.25×12.5×3.2 (6)30.8×0.35+6.5×3.08.
计算:7.5×46.7+52.3×7.5+7.5; (++﹣)×24; (2.5﹣2.5×0.6)÷0.4; ﹣(+2.4×)÷; 1.2+[2÷(2﹣2.4×)]; =.