Friday, October 24, 2008
Cross Multiplication
This week in math we learned about equivalent fractions. Mrs. Braymer taught us a trick to see if the fractions are equivalent. First, we have to figure out the two fractions based on the parts that are shaded in on the fraction bar. Second, we multiply the denominator from the left with the numerator from the right. Next, we multiply the denominator from the right with the numerator from the left. By multiplying diagonally, we can figure out if the fractions are equivalent.
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1 comment:
Cool! We learned how to do cross multiplication too. We have been learning how to write mixed fractions as a decimal this week as well. It really helps when you think about money when you are working with decimals.
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