综合套题十
4.53 × 1000 =	2.5 + 4.28 =	30 ÷ 1000 =
585 +37 =	5000 ÷ 50 =	67.4 × 100 =
720 - 90 =	6.1 - 3.2 =	62.2 + 62.9 =
40 ×44 =	5.2 ÷ 100 =	7.3 - 6.61 =
2、简便计算
999 × 629 + 629	25 × 125 × 8	3.46 + 3.33 + 3.32 + 1.67 + 3.68
7.14 - (1.14 + 2.66 )	4 × ( 25 + 900 )	4000 ÷ 4 ÷ 25
3、四则运算与灵活运用
6.6 + 9.48 - 6.5	135 + 444 ÷ 6 × 6	25 × 40 × 125
[8×(77+40)-221]×4	998 × 874	2813 - 858 - 342 - 213
449 - 1260 ÷ 14 ÷ 10	( 445 + 370 ) ÷ 5	56 × 390 ÷ 13