综合套题九
1、口算（≈为估算）
1200 ÷ 25 =	330 × 50 =	90 × 53 =
95 - 47 =	410 ÷ 70 =	88 × 8 =
850 + 90 =	601 × 87 ≈	311 - 85 =
5.5 + 3.8 =	9900 ÷ 70 =	150 ÷ 33 ≈
2、竖式计算（带*要求验算）
60 ×444 =	*110 ÷ 70 =	*909 × 69 =
1185 ÷ 39 =	398 ÷ 44 =	398 ÷ 64 =
3、脱式计算
916 + 65 × 9	3458 ÷ (19 × 14)	(90 + 42) ÷ 6