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Adding and Subtracting Integers

Adding and Subtracting Integers

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Adding and Subtracting Integers

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  1. 10 – 17 = 10 + (–17) Add the opposite of 17, which is –17. = –7 Simplify. COURSE 3 LESSON 1-4 Adding and Subtracting Integers Simplify the expression 10 – 17. 1-4

  2. Draw a diagram. COURSE 3 LESSON 1-4 Adding and Subtracting Integers The elevation of the Dead Sea is 396 m below sea level. A group of archaeologists leaves the shore of the Dead Sea and heads toward Jordan. They stop after ascending 500 m. What is their elevation? The diagram shows that the elevation of the archaeologists is given by the expression –396 + 500. 1-4

  3. Simplify by using the rule for adding integers with different signs. –396 + 500 = 104 COURSE 3 LESSON 1-4 Adding and Subtracting Integers (continued) The elevation of the archaeologists is 104 m above sea level. 1-4

  4. y – 38 = –5 – 38 Substitute –5 for y. = –5 + (– 38) Add the opposite of 38, which is –38. = –43 Simplify. COURSE 3 LESSON 1-4 Adding and Subtracting Integers Evaluate y – 38 for y = –5. 1-4

  5. COURSE 3 LESSON 1-4 Adding and Subtracting Integers Simplify each expression. 1. 11 – 17 2. 8 + (–6) 3. –1 – (–20) 4. 15 – 12 5. –4 + (–6) 6. 9 – (–2) 19 –6 2 11 3 –10 1-4