Lesson 15: Solving Real-Life Problems

Expert Level

Instructions

Let's use the abacus to solve a shopping problem.
You have $100 and buy items costing $27, $15, and $38.
Set 100 on the abacus: Hundreds (1 blue bead).
Subtract each purchase in sequence: First $27 (73), then $15 (58), finally $38.
The value should be 20, representing your remaining money!

T

100B

10B

B

100M

10M

M

100K

10K

K

100

10

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

5

1

1

1

1

Value: 0

Previous Lesson All Lessons