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Adding Integers with Tiles Student Expectations: 7 th Grade: 7.1.2C Use models, such as concrete objects, pictorial models, and number lines, to add, subtract, multiply, and divide integers and connect the actions to algorithms.

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ADDING INTEGERS We can model integer addition with tiles. Represent -2 with the fewest number of tiles Represent +5 with the fewest number of tiles. The University of Texas at Dallas

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ADDING INTEGERS What number is represented by combining the 2 groups of tiles? Write the number sentence that is illustrated. -2 + + 5 = + 3 -2 + + 5 = + 3 The University of Texas at Dallas +3+3

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ADDING INTEGERS Use your red and yellow tiles to find each sum. -2 + -3 = ? -2 + -3 = ? The University of Texas at Dallas ANSWER + = -5 -2 + -3 = - 5

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ADDING INTEGERS The University of Texas at Dallas - 6 + + 2 = ? + = - 4 + = +1+1 - 3 + + 4 = ? ANSWER - 6 + + 2 = - 4 - 3 + + 4 = + 1

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Integer Review If you are combining two numbers with: SAME SIGNS YOU ADDTAKE THE SIGN OF THE LARGER NUMBER DIFFERENT SIGNS YOU SUBTRACT TAKE THE SIGN.

Integer Review If you are combining two numbers with: SAME SIGNS YOU ADDTAKE THE SIGN OF THE LARGER NUMBER DIFFERENT SIGNS YOU SUBTRACT TAKE THE SIGN.

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