综合套题十
700 ÷ 25 =	56 +278 =	6.1 - 2.2 =
4 ×25 =	3.1 - 1.32 =	86.6 × 10 =
37.4 + 64 =	68.6 + 46.9 =	8.94 × 1000 =
130 - 50 =	40 ÷ 1000 =	7.8 ÷ 1000 =
2、简便计算
104 × 18	561 + 561 × 999	83 × 4 × 25
1.23 + 2.76 + 4.29 + 1.77 + 1.24	34000 ÷ (34 × 25 )	977 - 128 - 172
3、四则运算与灵活运用
4.95 + 5.8 - 3.9	302 - 1078 ÷ 7 ÷ 14	2.24 - 2.01 + 0.76
3×[384÷(70-64)+291]	639×484-32×639-639×52	7511 - 249 - 111 - 451
583 + 757 - 756	284 - 282 ÷ 3 + 46	60700 ÷ ( 607 ÷ 98 )