直接写得数.72×0.75=1.25×8=2.9+6.1=273+827=
计算下面各题,能简便计算就简便计算.429+31.1+2.04 100﹣27.2﹣42.8 9﹣(3.02+1.25) 1.8﹣1.57+0.2.
脱式计算.3.6×10.1 5.2×(4.7﹣1.9) 0.98+4.3×1.25.
脱式计算.(能简便的要用简便方法算)4.2+7.64+5.8+2.36 14.28﹣2.63﹣7.37 6.8+5.26+3.74+3.28.2×101﹣8.2 (520+480)÷50×4 400﹣(1300÷65+35)
能简算的要简便.0.25×9.87×4 36.7×2.1+10.8 8.45﹣0.45×0.10.73×102 7.8×5.6+2.3×4.4 76.3×27﹣76.3×17.
28×6.5﹣9.3 0.2×8.2×50 0.68×99+0.6825×32×1.25 2.4+7.6×4.3 (4.85+1.15)×0.37.