advertisement

Adding Integers 1) If the numbers have the same sign, add the absolute values and keep the sign. 2) If the numbers have different signs, subtract the absolute values and take the sign of the larger absolute value. Subtracting Integers 1. Rewrite subtraction problem as addition 2. Copy first number in problem (It never changes!) 3. Change the subtraction sign to addition. 4. Change the number after the subtraction sign to its inverse (opposite). (If the number was negative, it becomes positive; if the number was positive, it becomes negative.) 5. Follow rules for addition of integers. Examples: Write an expression and solve. 1) A team gains 20 yards. Then they lose 7 yards. 2) A team gained 5 yards on their first play. Then they lost 6 yards. Find their yardage.