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# TechMathII - 1.4and1.5 - ManipulatingNumbers

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### TechMathII - 1.4and1.5 - ManipulatingNumbers

1. 1. Bell Ringer <ul><li>Find the absolute value of each. </li></ul><ul><li>| -9 + 5 | </li></ul><ul><li>| 31 – 142 | </li></ul><ul><li>| -18 + -67 | </li></ul><ul><li>| -32 – (-12) | </li></ul>
2. 2. Adding/Subtracting Real Numbers <ul><li>98 + 89 </li></ul><ul><li>-67 + 17 </li></ul><ul><li>-18 + -59 </li></ul><ul><li>1/8 + 1/32 </li></ul><ul><li>-2/15 + 3/10 </li></ul>
3. 3. You try! <ul><li>1) 3/8 – 9/12 </li></ul><ul><li>2) -2/3 + 9/12 </li></ul><ul><li>3) 12 + 2/3 </li></ul><ul><li>4) 19 – 21/2 </li></ul>
4. 4. Multiplying/Dividing Real Numbers <ul><li>-4 * 2.5 </li></ul><ul><li>½ * 2/3 </li></ul><ul><li>-4/9 * 6/23 </li></ul><ul><li>1/8 1/12 </li></ul><ul><li>-7/12 3/11 </li></ul>
5. 5. You try 2! <ul><li>1) -3/5 * -4/17 </li></ul><ul><li>2) -1/5 3/11 </li></ul><ul><li>3) 1/14 * 6/7 </li></ul><ul><li>4) 7/13 5/26 </li></ul>
6. 6. Average - add up and divide by # of items <ul><li>Find the average of each set of numbers. </li></ul><ul><li>12, 15, 7, 21, 18, 19, 20 </li></ul><ul><li>25, 29, 33, 28, 28, 27 </li></ul><ul><li>89, 95, 86, 81, 97, 82, 80, 81, 93, 95, 97, 80 </li></ul>
7. 7. You try! <ul><li>Find the average of each set of numbers. </li></ul><ul><li>17, 19, 12, 24, 28, 13, 22, 20, 14, 19, 21 </li></ul><ul><li>42, 49, 53, 45, 40, 39, 56, 44, 47 </li></ul><ul><li>108, 111, 102, 115, 101, 99, 112 </li></ul>
8. 8. Homework <ul><li>Manipulating Numbers WS </li></ul>