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1/2 divided by 3/4Find the reciprocal of 3/4,4/31/2 multiplied by 4/31 times 4 = 42 times 3 = 64/6simplifyAnswer:2/3
7+(-3) = 4Find other equations using google search. It will appear in Google Calculator.
To subtract mixed numbers, convert the fractions into ones with a common denominator, make the first fraction larger than the second, subtract, then reduce the result if necessaryExample : 6 1/8 - 2 3/4Find the common denominator -- here it is 81/8 = 1/8 and 3/4 = 6/8 (you cannot subtract the fractions because the second is larger)So borrow from the whole number by making 6 1/8 into 5 9/8 (1= 8/8)Now 5 9/8 - 2 6/8 can be subtracted to yield 3 3/8---* More on "borrowing" to make the fraction larger : what you are doing is turning one of the whole numbers into an equal fraction and adding it to the fraction. Here we took 1 from the 6 making it 5, and added that 8/8 to the 1/8 to make the improper fraction 9/8. So the terms 6 1/8 and 5 9/8 have the same value.
Lowest Common MultipleThe smallest common multiple of two or more numbers is called the lowest common multiple (LCM). E.g. Multiples of 8 are 8, 16, 24, 32, …Multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, …In general:To find the lowest common multiple (LCM) of two or more numbers, list the multiples of the larger number and stop when you find a multiple of the other number. This is the LCM.Example 3Find the lowest common multiple of 6 and 9.Solution:List the multiples of 9 and stop when you find a multiple of 6.Multiples of 9 are 9, 18, …Multiples of 6 are 6, 12, 18, …Example 4Find the lowest common multiple of 5, 6 and 8.Solution:List the multiples of 8 and stop when you find a multiple of both 5 and 6.Multiples of 8 are 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, …Stop at 120 as it is a multiple of both 5 and 6.So, the LCM of 5, 6 and 8 is 120.