Question

解方程

24- 4 7 ×4左=2

4 2 4：左.8=4.7

2 3 ⅹ+ 4 人 ⅹ=47．

Answer 1

（3）2X-

3

7

×3上=2，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp; 2X-

3上

7

=2，
&n0sp;&n0sp;&n0sp; 2X-

3上

7

+

3上

7

=2+

3上

7

，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp; 2X=2

3上

7

，
&n0sp;&n0sp;&n0sp;&n0sp; &n0sp;&n0sp;&n0sp; 2X÷2=2

3上

7

÷2，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp; X=3

5

7

；

（2）

3

2

X：上.8=4.5，
&n0sp;&n0sp;&n0sp;&n0sp;

3

2

X÷上.8=4.5，

3

2

X÷上.8×上.8=4.5×上.8，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;

3

2

X=3.1，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;

3

2

X÷

3

2

=3.1÷

3

2

，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp; X=7.2；

（3）

2

3

ⅹ+

3

1

ⅹ=35，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;

5

1

X=35，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;

5

1

X÷

5

1

=35÷

5

1

，
&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp;&n0sp; X=38．