综合套题十
5.4 - 2.5 =	750 - 90 =	7.1 ÷ 1000 =
56.8 × 100 =	68.8 + 62 =	4 ×25 =
99.7 + 56.5 =	400 ÷ 25 =	9.01 × 1000 =
49 +887 =	50 ÷ 1000 =	60 - 8.15 =
2、简便计算
1001 × 495 - 495	725 - (325 + 387 )	25 × 8 × 125
18 × 102	545 + 423 + 534 + 355 + 166	7000 ÷ 25 ÷ 4
3、四则运算与灵活运用
6.28 + 2.9 - 1.33	986 ÷ 24 × 12	2×[155÷(36-31)+196]
25 × 48 × 125	157 - 1666 ÷ (14 × 7)	725 ÷ 25
998 × 242	( 390 + 145 ) ÷ 5	(21 × 4 - 36) × 7