What is the basic operation for rational numbers?
Adding and Subtracting Rational Numbers
Rational numbers are numbers that can be written as fractions with integers in the numerator and denominator. To add rational numbers, add the numerators of the fractions and keep the denominator the same. To subtract rational numbers, subtract the numerators and keep the denominator the same.
Do you prefer to add or subtract rational numbers?
- Add them
- Subtract them
- Neither, I find it equally difficult
Did you know?
The process of adding and subtracting rational numbers is called rational arithmetic. The first mathematician to formally define the process of rational arithmetic was the ancient Greek mathematician Euclid. The process of adding and subtracting rational numbers is used in cryptography to encrypt and decrypt data.
What strategies can we use to add and subtract rational numbers?
How can we identify when a sum or difference of two rational numbers is positive or negative?
If you add a positive rational number to a negative rational number, what is the sign of the resulting sum? Explain your reasoning.
How has working with rational numbers helped you develop a better understanding of the relationship between addition and subtraction?
What challenges have you faced in adding and subtracting rational numbers and how did you overcome them?