总千克数、每天吃的千克数和天数.(判断三个量成什么比例?)
递等式计算(能简算的要简算).6.56﹣2.7+3.44 0.25×9.8×40 4.5×0.9+5.5×0.9.
怎样简便就怎样算.(1)0.25×(4+0.4)+0.9(2)0.89×1.25﹣0.09×1.25(3)104×0.25(4)40×0.625+0.375×40.
计算下面各题,能简算的要简算.0.125×3.21×8 7.3×1.2﹣1.8 20÷0.4÷2.5 8.6×2.6+1.4×2.6 4.6×102.
计算能简便的要简便:(1)2.5×6.73×4 (2)18.6×5.8÷0.6 (3)3.25×0.8+6.75÷1.5(4)(6.3×1.4+3.7×1.4)×2.5 (5)2.4﹣25.3÷5.5+7.6 (6)3.8÷1.25÷1.25÷8÷8.
神机妙算细又巧.(计算下面各题能简算的要简算)21.28﹣21.28÷7×3 0.32×25×12.5 2.5×4.7﹣2.5+2.5×6.3 (77.4﹣3.096÷0.4)÷0.03 7.74×(2.8﹣1.3)+1.5×2.26.