1 corner 10 pieces

10 pentagonal tablet

1 5 yuan.

5 yuan II.

10 yuan 5 pieces.

100 yuan 1 sheet

teaching

Take out a dollar coin: how much is this, students?

. . .

Take out a five-dollar bill: how much is this, students?

. . .

All right. Who says a few one-dollar coins are as valuable as five-dollar bills?

. . .