综合套题十
75 ×60 =	8000 ÷ 50 =	50 ÷ 10000 =
60 - 4.63 =	310 - 20 =	7.7 + 20.7 =
9.7 ÷ 1000 =	679 +94 =	3.87 × 1000 =
5.5 - 2.7 =	53.1 + 22 =	97.9 × 100 =
2、简便计算
155 + 149 + 179 + 545 + 521	( 125 + 20 ) × 8	8 × (86 × 125 )
812 - (312 + 239 )	7000 ÷ 8 ÷ 125	368 × 49 + 368 × 51
3、四则运算与灵活运用
861 - 174 - 461	( 495 + 415 ) ÷ 5	1368 ÷ 72
[(108+80)÷4+185]×3	6.1 + 4.27 - 7.3	(504 ÷ 8 + 373) × 8
289 × 99	277 - 800 ÷ (5 × 20)	3.62 - 2.91 + 4.38