550÷50= 88+27= 103×40= 388+322= 546﹣299=90×70= 27×ll= 37+68×0= 25×14﹣25×4= 56×99+56=
脱式计算(能简便算的要简便算)(1)89.3×43+38×89.3+893×1.9 (2)10.01×101﹣10.01 (3)4.75×17.5+2.5×4.75(4)1.25×32×0.25 (5)0.22×1.5+1.541÷2.3 (6)(5.15﹣3.25)×0.4+0.36.
2.5×125×6.4×0.2.
400﹣213.15÷10.5;17.46﹣7.83﹣2.17+2.54;7.5+2.5+0.6×0.4﹣3.24;1.23×4+4.92×7+2×4.92;(10﹣9.5×0.48)+15.9÷0.75;3.5×[6.8﹣(1.6+3.6÷0.9)].
能简算的要简算:①9.1﹣1.2÷6﹣6.24 ②4.7×10.2 ③0.88×4.9+0.88×5.1④2.5×8×0.4×0.125 ⑤(5.63﹣1.88)×0.2 ⑥0.25×43.7×4.
脱式计算.①6.4÷(0.3×2+0.2)②68.1﹣77.7÷0.7×0.5③3.5×5.2+0.35×48④4.05÷0.81+2.4.