综合套题十
9.1 + 5.21 =	89 +558 =	130 - 40 =
5.2 - 2.4 =	16 ×25 =	7.7 ÷ 1000 =
6.44 × 1000 =	30 ÷ 1000 =	20 - 2.87 =
600 ÷ 25 =	99.6 × 100 =	55.5 + 87.6 =
2、简便计算
61 × 125 × 8	8.08 + 1.28 + 2.32 + 1.72 + 1.68	513 - 287 - 113
17 × 1004	9000 ÷ 4 ÷ 25	465 × 1001 - 465
3、四则运算与灵活运用
921 - ( 521 - 866 )	437 - 280 ÷ (4 × 10)	4.4 + 4.3 - 5.29
64400 ÷ ( 644 ÷ 53 )	74 × 25	901 - 228 ÷ 4 + 341
772 ÷ 48 × 12	306 - 359 + 361	[(1+59)÷4+208]×5