Wednesday, April 19, 2017

Estimania, perimeter and area, rounding up

For third graders, what are the shapes for which perimeter and area will be tested?

For third graders:
Perimeter can be asked for any shape. They will have to use some kind of strategy to find the perimeter.
For area, it will be rectangle and square.

Should all answers be rounded to the nearest whole number (no fractions or decimals)?

Students do not have to round up all the answers unless it is relevant to the question. For example if the question is how many people the answer should be a whole number.

a follow up to Estimania question:  So they may need to go out to the closest tenth or one hundredth of a decimal point?  The detailed description guide only says the following:

Questions will ask for answers in a specific unit of measurement: participants will be asked to give an answer to the nearest inch, the nearest hour, the nearest liter,etc. Many 4th and 5th grade questions will require two steps: 1) estimating and calculating then 2) converting to the unit of measurement asked in the question.

The goal of the event is to make students estimate their answers using different strategies. That is why the description says to give the answer to nearest inch, the nearest hour, the nearest liter,etc. However, if the question does not specifically say to round up to the nearest whole number, the students can give their answers using decimals as long as the answer make sense (for example the answer cannot be like 1.5 boys or 52.75 cars etc). They will not be penalized for that. Besides answers that are within 0-5% deviation get full points.