在横线里填上“<>或=”89520 101000 30×180 30×160600×10 10×660 23×40 4×230.
能简便的一定要简便:①4.7+7.69+5.3+2.31 ②53.78﹣13.6﹣37.4+6.22 ③57×101﹣57④(520+480)÷50×4 ⑤400﹣(1300÷65+35) ⑥60﹣(21.5﹣8.8)+7.3.
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.