小明每分钟行72米,小静每分钟行64米.(1)小明从家到学校需要几分钟?小静呢?(2)从学校到少年宫,小明要用8分钟,小静要用多少分钟?
10.4+0.6×0.8 (18.7+1.3)×1.4 1.5×2.06﹣0.061.7×4.9+4.9×8.3 39.6﹣9.6÷3 1.2×103
算一算,能简算的要简算.(1)5.42×99 (2)1.43×2.5+0.57×2.5(3)0.93÷0.6÷0.5 (4)6.8×25+0.32×4.2﹣8÷25.
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.