综合套题十
70 ×59 =	5.6 + 1.89 =	3.53 × 1000 =
75 +259 =	600 ÷ 25 =	10 ÷ 1000 =
50 - 2.02 =	6.1 ÷ 100 =	18.9 + 21.4 =
6.6 - 4.7 =	38.6 × 10 =	830 - 80 =
2、简便计算
24 × 8 × 125	999 × 227 + 227	622 - (322 + 171 )
7000 ÷ 125 ÷ 8	174 + 612 + 479 + 126 + 221	( 500 + 4 ) × 25
3、四则运算与灵活运用
[5×(63+99)-407]×2	2990 ÷ ( 299 ÷ 15 )	377 - 405 ÷ 3 ÷ 9
504 ÷ 36	48 × 125	6.8 + 3.4 - 2.5
868 - ( 168 - 769 )	0.87 - 1.63 + 1.13	(92 × 9 - 189) × 8