综合套题十
47 +584 =	40 ÷ 10000 =	27.9 + 27 =
630 - 90 =	37.9 + 85.6 =	1.6 ÷ 100 =
75.3 × 10 =	300 ÷ 25 =	8.1 - 6.5 =
24 ×125 =	80 - 7.55 =	6.37 × 1000 =
2、简便计算
45 × 4 × 25	14000 ÷ (14 × 25 )	577 - 201 - 199
682 + 754 + 455 + 118 + 245	16 × 109	1001 × 716 - 716
3、四则运算与灵活运用
25 × 80 × 125	25 × 74	2700 ÷ (9 × 15) + 120
6450 ÷ ( 645 ÷ 32 )	595 - ( 195 - 138 )	818 + 720 ÷ 8 × 2
8.6 - 8.46 + 1.21	( 235 + 290 ) ÷ 5	5×[4×(68-65) +259]