综合套题十
17.4 + 33 =	60 ×26 =	4.45 × 1000 =
340 - 50 =	9.7 - 1.8 =	3.1 ÷ 1000 =
22.6 × 100 =	80 ÷ 10000 =	66 +265 =
70 - 3.02 =	32.7 + 85.9 =	6000 ÷ 50 =
2、简便计算
125 × (8 × 72 )	178 + 512 + 122 + 786 + 388	13 × 109
121 × 64 + 36 × 121	50000 ÷ (50 × 25 )	8.88 - 2.35 - 1.65
3、四则运算与灵活运用
2×[702÷(87-78)+378]	900 ÷ (10 × 18) + 331	856 - ( 156 - 376 )
968×599-25×968-968×74	693 ÷ 63	7.14 - 3.8 + 8.23
667 × 98	79 × 390 ÷ 13	(56 × 9 + 361) × 3