Integer Rules
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Integer Rules Adding Integers • Same Signs: Add the numbers and keep the same sign -7 + -3 = -10 16 + 12 = 28 •
Different Signs: Subtract the numbers and use the sign that has more -12 + 7 = -5
15 + -8 = 7
Subtracting Integers • Subtracting = Adding the opposite -20 − -10 = -20 + 10 = -10 -20 − 10 = -20 + -10 = -30 20 − -10 = 20 + 10 = 30 20 − 10 = 20 + -10 = 10 Multiplying & Dividing Integers • Same signs = Positive answer -9 • -9 = 81 -72 ÷ -9 = 8 9 • 9 = 81 72 ÷ 9 = 8 • Different Signs = Negative answer -6 • 8 = -48 -36 ÷ 4 = -9 6 •-8 = -48 36 ÷ -4 = -9
Different Signs: Subtract the numbers and use the sign that has more -12 + 7 = -5
15 + -8 = 7
Subtracting Integers • Subtracting = Adding the opposite -20 − -10 = -20 + 10 = -10 -20 − 10 = -20 + -10 = -30 20 − -10 = 20 + 10 = 30 20 − 10 = 20 + -10 = 10 Multiplying & Dividing Integers • Same signs = Positive answer -9 • -9 = 81 -72 ÷ -9 = 8 9 • 9 = 81 72 ÷ 9 = 8 • Different Signs = Negative answer -6 • 8 = -48 -36 ÷ 4 = -9 6 •-8 = -48 36 ÷ -4 = -9
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