综合套题七
83 - (16 + 39) =	42 - 2 × 7 =	20 ÷ (2 × 2) =	7 × 8 + 78 =
534 - 48 ÷ 6 =	584 - 485 =	75 - 28 =	74 - 45 + 18 =
94 - 36 =	(43 - 38) × 6=	1000 - 823 =	358 + 276 =
26 + 56 =	49 ÷ (38 - 31) =	37 + 8 × 6 =	449 + 415 =
9 × 8 - 57 =	704 - 628 =	49 + (88 - 79) =	(16 + 29) ÷ 9=
3 × (4 + 2) =	653 - 495 =	54 ÷ 6 - 4 =	343 + 56 ÷ 7 =
29 + 57 - 58 =	7 × (12 ÷ 4) =	42 ÷ 6 + 787 =	168 + 808 =
笔算下列各题（1、4小题要验算）
(1)    412 + 219 =		(2)    284 + 669 =
(3)    629 + 357 =		(4)    875 - 226 =
(5)    447 - 288 =		(6)    461 - 307 =