Integer Book

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# Integer Book - PowerPoint PPT Presentation

Integer Book. Addition. Subtraction. Division. Multiplication. Addition Rules. If the signs are the same, add the numbers and keep the same sign. 5 + 2 = 7 - 8 + - 5 = - 12

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## PowerPoint Slideshow about 'Integer Book' - kirestin-battle

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Presentation Transcript

Integer Book

Subtraction

Division

Multiplication

• If the signs are the same, add the numbers and keep the same sign.
• 5 + 2 = 7 - 8 + - 5 = - 12
• If the signs are different, subtract the numbers. If you have more +’s the answer is +, and if you have more –’s the answer is -.
• - 12 + 3 = - 9 24 + - 12 = 12

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Multiplication Rules
• If the signs are the same, multiply and your answer will be positive. If the signs are different, multiply and your answer will be negative.
• - 6 * (-2) = 12 6 * 8 = 48
• - 4 * 5 = - 20 5 * (-2) = - 10

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Subtraction Rules
• Change the sign of the second number and change the subtraction sign to an addition sign. Then follow the addition rules.
• 10 – 4 = ? = 10 + (-4) = 6
• - 8 – (2) = ? = - 8 + (-2) = - 6

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Division Rules
• If the signs are the same divide and your answer will be positive. If the signs are different, divide and your answer will be a negative.
• - 5 / (-15) = 3 6 / 18 = 3
• - 20 / 4 = - 5 80 / (-10) = - 8

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