Addition of two fraction numbers
In this method, we simply multiply crosswise and add them to get numerator of the the answer and multiply bottom (denominators) of two fractions to get the bottom of answer (see example).
Example 1:
Multiply crosswise and add to get the numerator of the answer. Here 5×4=20 and 7×3=21. Then 20+21=41. The bottom of the fraction is just 3×4=12. So the answer is 41/12. Subtraction of two fraction numbers: Subtraction is same as that of addition; only the difference is that we have to subtract cross multiplication. In this method, we simply multiply crosswise and subtract them to get numerator of the answer and multiply bottom (denominators) of two fractions to get the bottom of the answer (see example).
Subtraction of two fraction numbers
Example 1:
Multiply crosswise and subtract to get the numerator of the answer. Here 5×4=20 and 7×3=21. Then 20-21=-1. The bottom of the fraction is just 3×4=12. So the answer is -1/12.
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