Newspaper topics in the first volume of mathematics in the sixth grade of primary school

After calculating the switch first, how much is it per person: 2 1/2= 10.5 (yuan).

Figure: (0 stands for pencil, 1 stands for ballpoint pen)

A: 0 0 0 0 0 0

B: 1 1 1 1。

A: 0 0 0 0 0 1

B: 1 1 1 0

5 pencils+1 ballpoint pen =3 ballpoint pens+1 pencil.

4 pencils =2 ballpoint pens

2 pencils = 1 ballpoint pen

Replace 2 pencils with 1 ballpoint pen: 6/2=3 (pieces)

Ballpoint pen: 2 1/(3+4)=3 yuan.

Pencil: 3/2= 1.5 (Yuan)