服装厂甲、乙两个车间赶制一批校服,甲车间3天做了345套,乙车间3天做了330套,平均每天甲车间比乙车间多做多少套?
20.06×65+380×2.006﹣2.006×30.
64×2.5×0.125 3×0.8+3×2.2 3.76÷0.4÷2.5(14.21+3.5)÷7 4.66×0.28+4.66×0.82﹣4.66 2.4+57.6÷36.
脱式计算.(能简算的要简算)15.58÷8.2﹣0.72 9.6+9.9×99 8×3.6+1.4×2.8 0.74×4×0.25×4.
计算:31.3×7.7+11+8.85+0.368×230=
7.5×2.3+1.9×2.5.