综合套题十
7.8 ÷ 1000 =	8.84 × 1000 =	19.5 + 95 =
578 +37 =	10 ÷ 1000 =	80.7 × 10 =
45.8 + 57.6 =	920 - 50 =	8000 ÷ 50 =
9.8 - 3.9 =	20 ×68 =	73.67 - 3.8 =
2、简便计算
505 - 172 - 128	8 × (24 × 125 )	1.36 + 3.48 + 5.12 + 3.52 + 1.88
251 × 101 - 251	79000 ÷ (79 × 125 )	12 × 101
3、四则运算与灵活运用
998 × 221	180 + 62 × 8 - 226	32 × 25
516 ÷ 72 × 24	399 - 1190 ÷ 14 ÷ 17	1.2 + 9.05 - 7.6
[6×(81+93)-283]×3	576 ÷ 72	54 × 25