题目
计算下面各题.
(1)
÷7×
(2)
( + )÷ +
(3)
( + × )÷
(4)
5.3× +2.7×25%
答案: 215 ÷7× 59 = 215 × 17 × 59 = 35 × 59 = 13
( 13 + 14 )÷ 12 + 56 =( 13 + 14 )×2+ 56 = 23 + 12 + 56 = 46 + 36 + 56 =2
( 23 + 415 × 56 )÷ 2021 =( 23 + 29 )× 2120 =( 69 + 29 )× 2120 = 89 × 2120 = 1415
5.3× 14 +2.7×25% =5.3× 14 +2.7× 14 =(5.3+2.7)× 14 =8× 14 =2