Adding and Subtracting integers

Joy earned 13 points in her first round and -21 points in her second turn. What was her score after 2 turns?

• 34
• 8
• -34
• -8

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CCSS.7.NS.A.1

CCSS.7.NS.A.3

-2 + 4 

• -2
• 2
• 0
• -4

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CCSS.7.NS.A.1

CCSS.7.NS.A.3

-9 + (-5)

• -14
• 14
• -4

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CCSS.7.NS.A.1

CCSS.7.NS.A.3

10 + (-4) = ?

• -6
• 6
• 14
• -14

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CCSS.7.NS.A.1

CCSS.7.NS.A.3

-14 + (-3)

• -17
• 11
• -11
• 17

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CCSS.7.NS.A.1

CCSS.7.NS.A.3

-10 + 10

• 20
• 0
• -20
• 1,000,000

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CCSS.7.NS.A.1

CCSS.7.NS.A.3

5 - 2

• 7
• 3
• -3
• -7

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CCSS.7.EE.A.1

CCSS.7.NS.A.1

CCSS.7.NS.A.3

-3 - 2

• -1
• -5
• 1
• 6

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CCSS.7.NS.A.1

CCSS.7.NS.A.3

12 - (-3) = 

• 9
• -9
• 15
• -15

Tags

CCSS.7.NS.A.1

CCSS.7.NS.A.3

What are the rules for subtracting integers?

• Change to multiplication and use the opposite of the second number.
• Change subtraction sign to addition and use the opposite of the second number.
• Find the opposite of both numbers and then add. 
• Subtract like normal and keep the larger sign. 

Tags

CCSS.7.NS.A.1