人教版五年级上册数学5简易方程练习十五作业本详细解答过程和答案
练习十五第1题详细解答过程和答案12x = 90 × 0.8
12x = 72
x = 6
x - 9 = 10 ÷ 2.5
x - 9 = 4
x = 13
6.1x = 12.2
x = 2
练习十五第2题详细解答过程和答案
都不对,左边x = 4,右边x = 2.5
练习十五第3题详细解答过程和答案
(1)70 - x = 24
(2)420 = 6v
练习十五第4题详细解答过程和答案
3x = 58 - 22
x = 12
7x - 14 = 2x
5x = 14
x = 2.8
页:
[1]