The Governor was Paid $251,419.91 Last Year _____________________________________________________________________________ Scientist Estimates There are 56,409.123 Possums in the United States _____________________________________________________________________________ Cost of Producing Cheese Drops to 81.8 Cents per Pound Due to Improved Efficiency at the Cheese Factory ____________________________________________________________________________ A Milk Factory Reports It Brought 27,309,604 Gallons of Milk from Farmers Last Year ____________________________________________________________________________ Mr. Brown rounded 14.486 to the nearest whole number by rounding 14.486 to 14.49 by the “over 5” rule. Then he rounded 14.49 to 14.5 by the same rule. Then he rounded 14.5 to 15 by the rule. Unfortunately this is wrong. Why is his answer “over wrong? How can using the 5” rule be misleading in some cases? Using a number line, show why his answer is wrong. Explain your thinking.
The Governor was Paid $251,419.91 Last Year _____________________________________________________________________________ Scientist Estimates There are 56,409.123 Possums in the United States _____________________________________________________________________________ Cost of Producing Cheese Drops to 81.8 Cents per Pound Due to Improved Efficiency at the Cheese Factory ____________________________________________________________________________ A Milk Factory Reports It Brought 27,309,604 Gallons of Milk from Farmers Last Year ____________________________________________________________________________ Mr. Brown rounded 14.486 to the nearest whole number by rounding 14.486 to 14.49 by the “over 5” rule. Then he rounded 14.49 to 14.5 by the same rule. Then he rounded 14.5 to 15 by the rule. Unfortunately this is wrong. Why is his answer wrong? How can using the “over 5” rule be misleading in some cases? Using a number line, show why his answer is wrong. Explain your thinking.
CCGPS_Math_5_Unit2Framework.docx