Question
Find the least common denominator for 
.
- 12
- 24
- 8
- 96
Hint:
In this question we have to find the least common denominator and for that we have to find the least common multiple of denominators. Least Common Denominator (LCD) is the least common multiple of denominator of a set of fractions. The method of calculating the LCD is same as calculation of Least Common Multiple of fractions denominators. The least common multiple (LCM) of two numbers is the lowest possible number that can be divisible by both numbers.
The correct answers are: 12, 24
The least common denominator is the lowest common multiple of the denominators of a set of fractions.
Step1:
We are given fractions 
and 
And we have to find the LCM of denominators of the fractions i.e. 
and 
.
Step2:
We know that Multiples of are:
And the multiples of are:
Step3:
Now we have to find the LCM of
From the above multiples of and it can be easily seen that the least common multiple of 
and is 
Hence the LCD of the and is 24.
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We can also it by simple division. As, Division in maths is the process of breaking a number up into equal parts, and finding out how many equal parts can be made.
Make use of the area model to determine the value of 3136 ÷ 64.
We can also it by simple division. As, Division in maths is the process of breaking a number up into equal parts, and finding out how many equal parts can be made.
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Estimate and divide 3429 ÷ 28.
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Division in maths is the process of breaking a number up into equal parts, and finding out how many equal parts can be made.
