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Published byChad Greer Modified over 7 years ago
1.2 ADDING AND SUBTRACTING INTEGERS I can find the sums and differences of integers by using a number line or using SSA/DSS.
YOU CAN ADD OR SUBTRACT USING A NUMBER LINE 3+5
YOU CAN ADD OR SUBTRACT USING A NUMBER LINE 3+(-5)
YOU CAN ADD OR SUBTRACT USING A NUMBER LINE -3+5
YOU CAN ADD OR SUBTRACT USING A NUMBER LINE -3+(-5)
ABSOLUTE VALUE The distance between a number and 0 on the number line.
SAME SIGNS ADD (SSA) To add two numbers with the same sign, add their absolute value. The sum has the same sign as the addends. Examples: 3+4 -3 + (-4)
DIFFERENT SIGNS SUBTRACT (DSS) To add two numbers with different signs, subtract the absolute values. The sum has the same sign as the addend with the greater absolute value. Examples: -3 + 4 3 + (-4)
INVERSE PROPERTY OF ADDITION Two number the same distance from 0 on a number line are called opposites (ex: 3 and -3) A number and its opposite are called additive inverses The inverse property of addition says: For every real number a, there is an additive inverse –a such that a + (-a) = 0 Examples?
SUBTRACTING INTEGERS To subtract a real number, add the opposite a – b = a + (-b) 3 – 5 3 – (-5)
ASSIGNMENT ODDS ONLY Pg. 13 #7-25
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