1. Round each number to the nearest ten and the nearest hundred. Use number lines if you find them helpful.

   number	nearest ten	nearest hundred
   18
   97
   312
   439
   601

2. Kiran and Priya are rounding some numbers, but they are stuck trying to round 415 and 750.

   • Kiran says, “415 doesn’t have a nearest multiple of 10, so it can’t be rounded to the nearest ten.”
   • Priya says, “750 doesn’t have a nearest multiple of 100, so it can’t be rounded to the nearest hundred.”

   Do you agree with Kiran and Priya? Explain your reasoning.

The table shows the numbers of people in different parts of a school at noon during a school day.

Andre and Lin are trying to estimate the number of people in the whole school. Andre plans to round the numbers to the nearest hundred. Lin plans to round them to the nearest ten.

1. Make a prediction: Whose estimate will be greater? Explain your reasoning.
2. Work with a partner to find Andre's and Lin’s estimates. Record them in the table. Then find the totals.

   location	number	Andre's estimate (nearest hundred)	Lin's estimate (nearest ten)
   playground	94
   cafeteria	163
   art room	36
   library	49
   classrooms	216
   gymnasium	109
   music room	52
   total

3. Make 2 observations about the completed table. Was your prediction correct?