食堂有面粉120吨,大米是面粉的3倍还多15吨,求食堂有大米面粉多少吨?
计算:71×54+82×54﹣153×46 .
计算(1)9999+999+99+9 (2)1797﹣(797﹣215) (3)999×999+2999 (4)125×4×8×25(5)26×101 (6)999×111+333×667 (7)1+2+3+4+…+99+100.
能简算的要简算.5×999+5+99×7+7+3×9+3+9 999×778+333×66615.6×13.1﹣15.6﹣15.6×2.1 [20﹣(90.75÷6.6+2.25)]×11.6.
计算.①125×64×25 ②57×99+62 ③384÷16×32 ④4673﹣867+567 ⑤462+3018+238+182.
细心算一算(能用简便的用简便算)125×25×32 283﹣(125+83)99999×26+33333×22 67×12+67×35+67×52+67100﹣98+96﹣94+92﹣90+…+8﹣6+4﹣2.