综合套题十
27.3 + 12 =	500 ÷ 25 =	850 - 80 =
7.6 - 6.9 =	50 ×74 =	82.4 + 41.8 =
953 +79 =	83.1 × 10 =	20 - 6.97 =
6.7 ÷ 100 =	2.59 × 1000 =	30 ÷ 1000 =
2、简便计算
356 × 47 + 356 × 53	78 × 4 × 25	1009 × 15
9.02 - (4.73 + 3.02 )	68000 ÷ (25 × 68 )	572 + 457 + 142 + 228 + 158
3、四则运算与灵活运用
5.38 - 3.8 + 6.57	878 - 263 - 578	650 ÷ 25
125 × 32	112 ÷ (2 × 4) + 292	34 × 25
2×[511÷(80-73)+460]	95 × 360 ÷ 12	(219 ÷ 3 + 990) × 2