Each symbol secretly stands for a number.
The key tells you which symbol means which number.
Replace the symbols with their numbers and then do the math.
The filled-in example next to it shows the answer.
Example
- 8
- 6
What does this exercise practice?
Translating symbols into numbers practices substitution and strengthens the understanding that a sign can stand for a value.
Common pitfalls
First replace all the symbols with numbers, then do the math. Whoever calculates right away easily mixes up the values.
How to practice at home
Make up your own secret signs for a few numbers and use them to encode little problems.
Related: Break apart, Calculation