综合套题九
1、口算(≈为估算)
33 × 40 = 477 ÷ 60 ≈ 870 × 60 =
701 - 72 = 7600 ÷ 60 = 790 + 20 =
402 × 23 ≈ 300 ÷ 80 = 33 × 9 =
2000 ÷ 25 = 7.5 + 4.9 = 96 - 28 =
2、竖式计算(带*要求验算)
      *201 × 39 =








      *380 ÷ 80 =








      705 ÷ 21 =








      66 ÷ 26 =








      30 ×236 =








      206 ÷ 29 =








3、脱式计算
      577 - 616 ÷ 8





      (48 - 43) × 4





      780 ÷ 4 ÷ 15