What two numbers will give you a product of 64 and a quotient of 4? Think-Pair-Share What two numbers will give you a product of 64 and a quotient of 4?
Solution 16 and 4 16 x 4 = 64 16 ÷ 4 = 4
Adding Integers
Adding Integers We can use positive and negative counters to model the addition of integers. Positive Integer Negative Integer A positive integer paired with a negative integer form a zero pair. The value of a zero pair is 0.
Add -2 + (-4) = -6
Add 5 + 6 = 11
Add -3 + (-5) = -8
Add -3 + -2 = -5
Adding Integers with like signs. Do you notice a pattern or rule? Comp book page 24 Adding Integers with like signs. - add their absolute values, keep the same sign as the integers. Examples: -7 + (-3) = -10 5 + 4 = 9
= -2 Add -5 + 3 Remove all the zero pairs.
= 3 Add 4 + (-1) Remove all the zero pairs.
= -1 Add -6 + 5 Remove all the zero pairs.
= -4 Add 3 + (-7) Remove all the zero pairs.
Did you notice a pattern or rule? Comp book page 24 Adding integers with unlike signs. - When the signs are different, subtract their absolute values, keep the same sign as the integer with the greater absolute value. Examples: 8 + (-3) = 5 -8 + 3 = -5
Let’s try a few examples using the rules for adding integers. -20 -6 12 -2 -38 13 1) -8 + 8 = 2) -9 + -11 = 3) 13 + (-19) = 4) 7 + 5 = 5) -12 + 10 = 6) -22 + (-16) = 7) 18 + (-5) =
Summary Adding Integers with like signs. - add their absolute values, keep the same sign as the integers. Adding integers with unlike signs. - When the signs are different, subtract their absolute values, keep the same sign as the integer with the greater absolute value.