Monday 91916 Write the IC and HW in
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Monday, 9/19/16 Write the IC and HW in your planner. IC: Add/Sub. Rational #s with Decimals HW: Decimal Rational #s WPs Wkst Materials • • Pencil, Slate, Marker, Eraser Math Folder Extra Credit Q 1 #5
Please solve. 1) 7. 5 + (-2. 9) Different signs subtract 4. 6 2) 3. 4 – (-1. 23) 3. 4 + 1. 23 Same signs add 4. 63 1. 23 3. 4 0 + 4. 6 3 6 1 7. 5 -2. 9 +4. 6
Ch. 2. 2 Objective: TSWBAT solve addition and subtraction problems with positive and negative decimal #s in context.
Ex. 1) You owe your mom $45. 23 after she bought you what you begged for at Target. Good news! Your dad gave you the money in his pocket which totaled $11. 15. a) Write an expression that matches this situation. -45. 23 + 11. 15 b) How much more money do you need to pay your mom back? 11 Different signs subtract You need to pay your mom $34. 08 -45. 23 11. 15 - 3 4. 0 8
Ex. 2) The floor of the shallow end of a swimming pool is 3. 8 feet. The floor of the deep end is 5. 47 deeper. Write an expression that matches this situation. -3. 8 - 5. 47 How deep is the deep end? -3. 8 + -5. 47 Same signs add The deep end is -9. 27 feet. 1 -3. 8 0 -5. 47 - 9. 2 7
Ex. 3) A shark is at -39. 1 feet. It swims up and jumps out of the water to a height of 8. 54 feet. High - low Write a subtraction expression for the vertical distance the shark travels. (Hint: think about how you find the range…) 8. 54 - -39. 1 How far does the shark travel? 8. 54 + 39. 1 Same signs add The shark traveled 47. 64 feet. 8. 54 39. 1 0 4 7. 6 4 1
Ex. 6) Find the distance between -1. 5 and -3. 2 on a number line. High - low -1. 5 - -3. 2 -1. 5 + 3. 2 2 1 3. 2 -1. 5 1. 7 Different signs subtract -1. 5 and -3. 2 are 1. 7 spaces apart. 1. 7
Ex. 4) The temperature was -15. 3 degrees when Bob the Bear woke up in Alaska. At lunch time, thermometer showed 57 degrees. What was the change in temperature from when Bob the Bear woke up until lunch time? High - low Write an expression that matches this situation. 57 - -15. 3 ______________ 1 Solve. 57 + 15. 3 Same signs add 57. 0 15. 3 7 2. 3 The temperature increased 72. 3 degrees.
Ex. 5) The table shows the annual profits (in billions of dollars) of a financial company from 2008 to 2012. Positive numbers represent gains, and negative numbers represent losses. What is the overall gain or loss over the 5 year period? Add to see the change each year -1. 7 + -4. 75 + 1. 7 + 0. 85 + 3. 6
-1. 7 + -4. 75 + 1. 7 + 0. 85 + 3. 6 -6. 45 + 1. 7 + 0. 85 + 3. 6 1 -1. 7 0 -4. 75 - 6. 4 5 5 -4. 75 + 0. 85 + 3. 6 -3. 9 + 3. 6 -0. 3 Same signs Different signs add subtract 1 -6. 45 1. 7 0 - 4. 7 5 3 1 -4. 75 0. 85 - 3. 9 0 -3. 9 3. 6 - 0. 3
Ex. 5) The table shows the annual profits (in billions of dollars) of a financial company from 2008 to 2012. Positive numbers represent gains, and negative numbers represent losses. What is the overall gain or loss over the 5 year period? Add to see the change each year -1. 7 + -4. 75 + 1. 7 + 0. 85 + 3. 6 -0. 3 The company had a loss of $0. 3 billion.
