A comparison of two quantities by division is known as a ratio. A ratio is expressed as a number of one item compared to a corresponding number of another item.
Continue ReadingAccording to PurpleMath, there are three common notations to express ratios. One method expresses the ratio in words; for example, if there are 35 people at a party, of which 15 are men and 20 are women, then the ratio of men to women is "15 to 20." This can also be expressed in odds notation as "15:20" or in fractional notation as "15/20." As the total number increases or decreases by a certain scale factor, the items on both sides of the ratio increase or decrease by the same scale factor. For example, if the number of total people at the party were multiplied by a factor of two and there were 70 people at the party, the ratio of men to women would be 2*15 : 2*20, or 30:40. Ratios are used in setting up proportions, which are equations used to calculate the amount of one item if the other item is known.
Learn more about ArithmeticBrainPOP provides lesson plan activity ideas on how to teach rounding numbers, such as hopscotch and the comparison of distances. Math Play, K5 Learning, Math-Aids.com and ABCya.com also provide worksheets and online games for students of various levels.
Full Answer >Teachers use base-10 blocks to represent large numbers in addition, subtraction, multiplication and division problems. Students count and move the blocks around to figure out the answers.
Full Answer >Partial quotient is a step-by-step method of division wherein at each step, a partial answer is obtained. After all the steps have been completed, the partial answers are added together to get the quotient.
Full Answer >The symbol representing long division does not actually have a name. It is usually simply referred to as a "long division symbol" or a "division bracket."
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