SECTION 1-5 : ADDING and SUBTRACTING REAL NUMBERS

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SECTION 1-5 : ADDING and SUBTRACTING REAL NUMBERS ALGEBRA I @ SECTION 1-5 : ADDING and SUBTRACTING REAL NUMBERS

ADDITION RULES Examples…. SAME SIGNS DIFFERENT SIGNS Keep signs Use sign of larger Add number Subtract Examples….

SUBTRACTION RULE Add the opposite or Keep – Change - Change Examples…

Find each sum or difference. 1) 34 + (-23) ANSWER : 11 2) -12 + (-39) ANSWER : -51 3) -17 – 25 ANSWER : -42 4) -17.6 – 2.9 ANSWER : -20.5 5) -14.7 – (-22.9) ANSWER : 8.2

6) -0.8 + 5.6 – 3.2 + 4 ANSWER : 5.6 ANSWER : -1/2 ANSWER : 23/18 ANSWER : 3 19/28

ALGEBRA I - SECTION 1-5 (Adding and Subtracting Real Numbers) 10) Evaluate if a = -5.6 and b = -4.7. a - b ANSWER : -0.9 ANSWER : -1/35

12) John is the running back for Doh High School 12) John is the running back for Doh High School. He had the following runs in the last football game : gain 4 yards, lost 3 yards, gain 16 yards, gain 3 yards, no gain, lost 5 yards, gain 8 yards, gain 22 yards, lost 3 yards. What is John’s total yards for the game? ANSWER : +42 yards

As you can see, John is #1 in math also.