综合套题十
70 ÷ 1000 =	2.9 + 8.91 =	6000 ÷ 50 =
82.2 × 100 =	24 +487 =	470 - 80 =
5.1 - 4.6 =	47.28 - 8.8 =	2.49 × 1000 =
46 ×60 =	9.6 ÷ 1000 =	68.3 + 26.9 =
2、简便计算
85 × 4 × 25	1.46 + 4.62 + 6.61 + 2.54 + 1.38	868 - (168 + 129 )
49000 ÷ (49 × 25 )	25 × ( 100 + 4 )	576 × 176 + 824 × 576
3、四则运算与灵活运用
[(90+81)÷9+137]×6	64 × 990 ÷ 11	3.78 - 4.5 + 4.22
(50 × 5 + 876) × 4	819 ÷ 13 ÷ 7 + 473	125 × 72 × 25
8.4 - 3.1 + 5.49	950 ÷ 25	684 - 186 - 284