综合套题十
20 - 2.38 =	5.2 - 3.5 =	80 ÷ 10000 =
88.7 + 1.8 =	3.1 ÷ 1000 =	74.8 × 10 =
630 - 90 =	44.2 + 23 =	6.83 × 1000 =
347 +57 =	51 ×50 =	800 ÷ 25 =
2、简便计算
625 × 187 - 87 × 625	184 × 101 - 184	309 + 337 + 154 + 291 + 146
6.86 - (2.04 + 1.86 )	6000 ÷ 4 ÷ 25	25 × (4 × 63 )
3、四则运算与灵活运用
702 + 66 × 9 - 181	640 ÷ 20 ÷ 16 + 210	607×986-72×607-607×14
96 × 320 ÷ 16	925 - 126 - 625	[4×(97+88)-394]×6
6.57 + 8.1 - 2.52	8568 - (268 + 509 )	1875 ÷ 75 × 25