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Do Now Solve

Do Now Solve. -30 + (-51) = -34 + (-47) = -36 + 15 = 12 + (-42) = 120 + (-36) = -3 + 45 = 27 + (-42) =. 25 + 45 = -25 + 45 = 47 + (-9) = -44 + 16 = 4 + (-26) = -40 + (-5) = 41 + (-4) =. Do Now Solve. -30 + (-51) = -81 -34 + (-47) = -81 -36 + 15 = -21 12 + (-42) = -30

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Do Now Solve

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  1. Do NowSolve • -30 + (-51) = • -34 + (-47) = • -36 + 15 = • 12 + (-42) = • 120 + (-36) = • -3 + 45 = • 27 + (-42) = 25 + 45 = -25 + 45 = 47 + (-9) = -44 + 16 = 4 + (-26) = -40 + (-5) = 41 + (-4) =

  2. Do NowSolve • -30 + (-51) = -81 • -34 + (-47) = -81 • -36 + 15 = -21 • 12 + (-42) = -30 • 120 + (-36) = 84 • -3 + 45 = 42 • 27 + (-42) = -15 25 + 45 = 70 -25 + 45 = 20 47 + (-9) = 38 -44 + 16 = -28 4 + (-26) = -22 -40 + (-5) = -45 41 + (-4) = 37

  3. Subtracting Integers • When subtracting: • Find the ADDITIVE INVERSE of the second integer • Then solve as an addition problem

  4. Subtracting Integers • When subtracting: • Find the ADDITIVE INVERSE of the second integer • Then solve as an addition problem • What is additive inverse? • It’s simply the opposite of a number

  5. Subtracting Integers • How do we find the additive inverse? • Ex. -14 – 21 =

  6. Subtracting Integers • How do we find the additive inverse? • Ex. -14 – 21 = • Change the subtraction sign to an addition sign -14 + 21 =

  7. Subtracting Integers • How do we find the additive inverse? • Ex. -14 – 21 = • Change the subtraction sign to an addition sign -14 + 21 = • Take the opposite of the second integer -14 + (-21) = -35

  8. Subtracting Integers • Try finding the additive inverse first: • Ex. 20 – 25 = • Ex. 16 – (-13) = • Ex. -21 – 14 = • Ex. -30 – (-4) =

  9. Subtracting Integers • Try finding the additive inverse first: • Ex. 20 – 25 = 20 + (-25) = -5 • Ex. 16 – (-13) = • Ex. -21 – 14 = • Ex. -30 – (-4) =

  10. Subtracting Integers • Try finding the additive inverse first: • Ex. 20 – 25 = 20 + (-25) = -5 • Ex. 16 – (-13) = 16 + (+13) = 29 • Ex. -21 – 14 = • Ex. -30 – (-4) =

  11. Subtracting Integers • Try finding the additive inverse first: • Ex. 20 – 25 = 20 + (-25) = -5 • Ex. 16 – (-13) = 16 + (+13) = 29 • Ex. -21 – 14 = -21 + (-14) = -35 • Ex. -30 – (-4) =

  12. Subtracting Integers • Try finding the additive inverse first: • Ex. 20 – 25 = 20 + (-25) = -5 • Ex. 16 – (-13) = 16 + (+13) = 29 • Ex. -21 – 14 = -21 + (-14) = -35 • Ex. -30 – (-4) = -30 + (+4) = -26

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