综合套题十
12.1 × 100 =	2.5 ÷ 1000 =	98 +644 =
40 - 5.81 =	6.37 × 1000 =	500 ÷ 25 =
81.6 + 73.6 =	4.5 + 9.21 =	9.4 - 6.8 =
30 ÷ 1000 =	66 ×70 =	540 - 50 =
2、简便计算
345 + 345 × 999	2.94 + 1.65 + 8.84 + 6.06 + 2.35	64 × 8 × 125
1009 × 19	6.88 - (1.12 + 2.88 )	8000 ÷ 4 ÷ 25
3、四则运算与灵活运用
1.73 - 3.47 + 2.27	6000 ÷ 600	5×[(81-32)×7+166]
816 - 343 + 348	781 - 83 × 2 + 464	12 × 25
594 ÷ (3 × 18) + 194	902 × 98	9.88 + 7.91 - 3.83