Notes Over 2.3 Use a number line to find the sum. right 6 left 1

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Presentation transcript:

Notes Over 2.3 Use a number line to find the sum. right 6 left 1 l l l l l l l l l l l l l l l -8 -7 -6 -5 -4 -3 -2 -1 0 -8 -7 -6 -5 -4 -3

Notes Over 2.3 Use a number line to find the sum. left 4 l l l l l l 5 6 7 8 9 10 left 2 left 3 l l l l l l l 3 4 5 6 7 8 9

Notes Over 2.3 Use a number line to find the sum. left 1 left 4 l l l l l l l -7 -6 -5 -4 -3 -2 -1 left 7 right 1 l l l l l l l l 0 1 2 3 4 5 6 7

Notes Over 2.3 Name the property that makes the statement true. Communitive Property of Addition Identity Property of Addition Associative Property of Addition Inverse Property of Addition

Notes Over 2.3 Yes, the store made a profit of $594.65. Use addition in real life. 11. A bookstore had a first-quarter profit of $342.60, a second-quarter loss of $78.35, a third-quarter loss of $127.40, and a fourth-quarter profit of $457.80. Did the store make a profit during the year? Explain. Add the negatives together Add the positives together Subtract the results Yes, the store made a profit of $594.65.

Notes Over 2.3 A loss of $0.25 Use addition in real life. 12. The price of a share of stock increased $3.00 on Monday, decreased $1.25 on Wednesday, and decreased $2.00 on Friday. Find the overall change in the price of a share of stock. Add the negatives together Combine the positives and negatives A loss of $0.25

Notes Over 2.3