问题 解答题
求未知数.
3
20
:6=
6.5
x

3
4
x-1.4=3.6+
2
3
x.
答案

(1)

3
20
:6=
6.5
x

3
20
x=6×6.5,

3
20
x=39,

3
20
20
3
=39×
20
3

x=260;

(2)

3
4
x-1.4=3.6+
2
3
x,

3
4
x-1.4-
2
3
x=3.6+
2
3
x-
2
3
x,

1
12
x-1.4=3.6,

1
12
x-1.4+1.4=3.6+1.4,

1
12
x=5,

1
12
x×12=5×12,

x=60.

单项选择题 A3/A4型题
填空题