https://www.brainpop.com/math/dataanalysis/comparingprices/
https://www.brainpop.com/math/numbersandoperations/decimals/
https://www.brainpop.com/math/dataanalysis/rounding/
https://www.brainpop.com/math/numbersandoperations/decimals/
https://www.brainpop.com/math/dataanalysis/rounding/