WARM UP: If you add a positive number and a negative number, what determines whether the sum will be positive or negative?
Positive and Negative Number in a number line
Positive Numbers: Any number greater than zero is considered a positive number. Negative Numbers: Any number less than zero is considered a negative number.
Adding two positive numbers together results in a larger positive number. Adding two negative numbers together results in a larger negative number. Adding a positive and a negative number together results in the difference of the two numbers.
Adding Positive and Negative Numbers
Work together in pairs: What is the result when you add a positive number and a negative number with the same absolute value?
What is the result of adding -5 and 3?
What is the sum of -10 and -7?
If you add a positive number to a negative number, what is the sign of the result?
What is the sum of -15 and 20?
If you add two positive numbers, what will be their sum's sign?
Exit Ticket : What is the result when you two negative number together?