Mastering Integer Addition and Subtraction

What are integers?

• Only positive numbers

• Only negative numbers

• Positive and negative numbers, including zero

• Numbers with decimals

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CCSS.7.EE.B.3

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How do you add two integers with the same sign?

• Divide the numbers

• Multiply the numbers

• Add the numbers and keep the sign

• Subtract the numbers

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What happens when you add two integers with different signs?

• Subtract the numbers and keep the sign of the larger number

• Multiply the two numbers

• Add the numbers and change the sign

• Keep the sign of the smaller number

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When adding two integers with different signs, you should:

• Always keep the negative sign

• Always keep the positive sign

• Subtract the numbers and keep the sign of the larger number

• Add the numbers and divide by 2

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CCSS.7.NS.A.1

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How do you subtract integers?

• Divide the numbers

• Add the opposite of the number being subtracted

• Directly subtract one from the other

• Multiply the numbers

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To subtract integers, one should:

• Change the subtraction to addition and use the opposite sign

• Only subtract numbers with the same sign

• Always subtract the smaller from the larger number

• Keep the original signs and subtract

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CCSS.7.NS.A.1

What is the result of 2 minus 3?

• -5

• 5

• 1

• -1

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What is the result of 15 minus (-5)?

• 10

• -10

• 20

• -20

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CCSS.7.NS.A.1

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What is the result of -14 minus 18?

• -32

• 4

• 32

• -4

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