Rounding

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Rounding

  1. 1. November 24, 2009 <ul><li>Answer the 9 questions on the exit slip. </li></ul><ul><li>NO TALKING! This is for a grade. </li></ul><ul><li>When you are done, wait quietly. </li></ul>
  2. 2. DECIMAL FRACTIONS <ul><li>The chart below gives the place value for each digit in the number 1.23 </li></ul>HUNDREDTHS TENTHS WHOLE 3 2 • 1
  3. 3. ROUNDING DECIMAL FRACTIONS <ul><li>Rounding rules: </li></ul><ul><li>Determine place value to which number is to be rounded </li></ul><ul><li>Look at digit immediately to its right </li></ul><ul><ul><li>If digit is less than 5, drop it and all digits to its right </li></ul></ul><ul><ul><li>If digit is 5 or more, add 1 to digit in place to which you are rounding. Then drop all digits to its right </li></ul></ul><ul><li>Round the number 1.27 to the nearest tenth. </li></ul>
  4. 4. The Dime Store <ul><li>If your purchase comes to a price that has four or less in the cents position, the store will lower the price to the 10 cents below the actual price. </li></ul>$5.23 $5.20
  5. 5. The Dime Store <ul><li>If a purchase amounts to a price that has five or more in the cents position, the store will raise the price to the 10 cents above the actual price. </li></ul>$17.78 $17.80
  6. 6. $23.42 $13.56 Round to the nearest tenths place.
  7. 7. $8.79 $2.82 Round to the nearest tenths place.
  8. 8. $3.11 $15.65 Round to the nearest tenths place.
  9. 9. The Dollar Store <ul><li>There is a store named “The Dollar Store” </li></ul><ul><li>For payment, it only accepts dollar bills, and it only gives change in dollars. </li></ul>
  10. 10. Round to the nearest ones place. $1.36 $5.58
  11. 11. Round to the nearest ones place. $37.82 $14.12

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