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Introduction to Real Numbers: Addition, Subtraction & Absolute Value

Learn to add and subtract real numbers, understand absolute values, and solve mathematical problems. Practice exercises included.

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Introduction to Real Numbers: Addition, Subtraction & Absolute Value

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  1. Objectives Add real numbers. Subtract real numbers.

  2. 11 10 7 6 5 4 3 2 1 9 8 0 –4 + (–7) + (–7) –4+ (–7) = –11

  3. -3 -2 -1 0 1 2 3 4 5 6 8 9 7 3 – (–6) 3 – (–6) = 9

  4. The absolute value of a number is the distance from zero on a number line. The absolute value of 5 is written as |5|. 5 units 5units - - - - - 6 5 - 1 0 1 2 3 4 5 6 4 3 2 |–5| = 5 |5| = 5

  5. y + (–2) for y = –6

  6. –13.5 + (–22.3)

  7. x + (–68) for x = 52 –6.7 – 4.1

  8. 5 – (–4)

  9. x – (–12) for x = –14

  10. What if…?The tallest known iceberg in the North Atlantic rose 550 feet above the ocean’s surface. How many feet would it be from the top of the tallest iceberg to the wreckage of the Titanic, which is at an elevation of –12,468 feet?

  11. HW Pages 17-19/13-23 odd,28-68 even

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