GUESSING YOUR AGE
· Think of a number from 1 to 9.
· Multiply this number by 2.
· Add 5.
· Multiply the result by 50.
· If you have already celebrated your birthday this year, add 1761.
· If you haven’t celebrated your birthday this year, add 1760.
· Finally, subtract the year you was born.
The result is a three-digit number:
Introducción al algebra
¿Y para qué sirve el álgebra?
Traduciendo la vida cotidiana al Álgebra
· Think of a number from 1 to 9.· Multiply this number by 2.
· Add 5.
· Multiply the result by 50.
· If you have already celebrated your birthday this year, add 1761.
· If you haven’t celebrated your birthday this year, add 1760.
· Finally, subtract the year you was born.
The result is a three-digit number:
- The first digit is the number you thought of.
- The two following numbers are YOUR AGE!!!!
Using algebraic language, explain why this happens. Answer
It's not only tricky to teach – pupils often simply don't see the point of algebra. Maths teacher Jonny Heeley gives an algebra masterclass to an audience of year 10 students from three London schools and starts by amazing them when he correctly guesses their birthdays.
Introducción al algebra
¿Y para qué sirve el álgebra?
Traduciendo la vida cotidiana al Álgebra
In several Mathematical situations we need to work with unknown numbers. In these situations, we use letters instead of numbers. We call these letters variables. Then these letters have the same operation properties as numbers.
