综合套题七
55 - 28 =	7 × (40 ÷ 5) =	228 + 474 =	35 - 28 =
5 × 8 - 19 =	682 - 3 × 8 =	35 ÷ 7 + 628 =	(13 + 32) ÷ 9=
1000 - 491 =	8 × (3 + 2) =	32 ÷ (2 × 4) =	697 + 7 × 7 =
91 - (16 + 27) =	308 + 36 ÷ 6 =	(69 - 65) × 2=	772 - 405 =
126 + 647 =	6 × 8 + 214 =	36 ÷ (73 - 67) =	55 + 36 =
806 - 347 =	416 + 135 =	22 + 69 - 15 =	72 - 36 + 49 =
866 - 45 ÷ 5 =	281 - 278 =	47 + (44 - 18) =	24 ÷ 4 - 2 =
笔算下列各题（1、4小题要验算）
(1)    234 + 348 =		(2)    415 + 557 =
(3)    408 + 396 =		(4)    581 - 324 =
(5)    524 - 517 =		(6)    752 - 465 =