计算:(1)460×7 (2)209×9 (3)59÷8(4)143×7 (5)※800﹣109 (6)※578﹢365.
怎样简便怎样算.(1)2.04+1.96﹣0.35 (2)20.78﹣5.4﹣4.6 (3)25×32×125(4)8.2×99+8.2 (5)4×4.78×0.25 (6)0.65×99(7)21.36÷08﹣12.9 (8)1.2×2.5+0.8×2.5 (9)102×0.45.
脱式计算. 96÷(15.4﹣12.2) 9÷[0.3×(8﹣6.5)] 0.175÷0.25÷0.40.175÷0.25×4 0.36÷[(6.1﹣4.6)×0.8] 3.6×0.4+1.2×5.
怎样算简便就怎样算.6.71×0.52+4.8×0.671 2.5×(3.5﹣1.65)×0.4 102×4.56.25÷1.25÷0.8 8.3﹣2.63+2.73×1.5.
(能简算的用简算)(1)3.72﹣(1.72+1.3) (2)208×7.3﹣20.8×63 (3)15×888+32×0.125×0.25(4)+﹣ (5)+++ (6)﹣(﹣)
脱式计算(能简算的要简算)2.5×1.37×0.4 4.8×0.25 0.89×4.8+0.89×5.2101×0.78 8.8×1.25 4.3×0.8×5.