Multiplying Integers | MathHelp.com - By MathHelp.com
| 00:0-1 | Here were asked to multiply two times negative five times | |
| 00:03 | negative nine . We begin by multiplying two times negative | |
| 00:08 | five . Since a positive times a negative is a | |
| 00:11 | negative positive , two times negative five is negative 10 | |
| 00:17 | , And we have negative 10 times negative nine . | |
| 00:23 | Since the negative times a negative is a positive negative | |
| 00:26 | 10 times negative nine is positive 90 So two times | |
| 00:34 | negative five times negative nine is positive 90 . |
DESCRIPTION:
This lesson covers comparing fractions. Students learn to compare fractions with the same denominator, which are called like fractions, by comparing the numerators. For example, to compare 7/9 and 4/9, note that 7 is greater than 4, so 7/9 is greater than 4/9. Students also learn to compare fractions with the different denominators, which are called unlike fractions, by first finding a common denominator, then comparing the numerators. For example, to compare 1/2 and 1/3, first find a common denominator, or the Least Common Multiple of 2 and 3, which is 6. To get 6 in the denominator of 1/2, multiply the numerator and denominator by 3, to get 3/6. To get 6 in the denominator of 1/3, multiply the numerator and denominator by 2, to get 2/6. Next, compare 3/6 and 2/6. Note that 3 is greater than 2, so 3/6 is greater than 2/6, which means that 1/2 is greater than 1/3.
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