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If the denominators are the same, just add or subtract the numerators. For example, 2/7 + 3/7 = 5/7. am i right?

Q: Rules of adding and subtracting similar fractions?

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Ensure that the denominators are the same when adding or subtracting fractions.

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If their denominators are different then find their lowest common denominator by means of their lowest common multiple remembering to adjust their numerators accordingly before adding or subtracting.

If the denominators are the same (which is what I understand by "similar fractions"), just subtract the numerators (the upper part).

You multiply the fractions until the denominators are equal. Then, you subtract.

Related questions

Ensure that the denominators are the same when adding or subtracting fractions.

no answer

If their denominators are different then find their lowest common denominator by means of their lowest common multiple remembering to adjust their numerators accordingly before adding or subtracting.

If the denominators are the same (which is what I understand by "similar fractions"), just subtract the numerators (the upper part).

You multiply the fractions until the denominators are equal. Then, you subtract.

Subtracting a negative is the same as adding the equivalent positive. For example, subtracting minus 10 is the same as adding 10.

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David Missoula's

You subtract a polynomial by adding its additive inverse. For example, subtracting (x - y) is the same as adding (-x + y). Alternately, you can simply subtract similar terms - that is, subtract the coefficients (the numbers) for terms that have the same combination of variables.

They aren't. The rules are the same as those for adding/subtracting or multiplying integers. Just be careful of the decimal point's location.

Because common denominators allow adding and subtracting of numerators. Improper fractions also have simplified rules over mixed numbers when performing multiplication and division.

line up the decimal point when your adding and subtracting. add annex a zero when you have extra number. sometimes you can use a number line.