Ensure that the denominators are the same when adding or subtracting fractions.
You multiply the fractions until the denominators are equal. Then, you subtract.
your mom is 2
Subtracting a negative is the same as adding the equivalent positive. For example, subtracting minus 10 is the same as adding 10.
If the denominators are the same, just add or subtract the numerators. For example, 2/7 + 3/7 = 5/7. am i right?
I assume you mean, with different denominators. If you want to add the fractions, subtract them, or compare them (determine which one is greater), you have to convert them to similar fractions (fractions with the same denominator) first. Converting to similar fractions is not necessary, and usually doesn't even help, if you want to multiply or divide fractions.
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.
- when adding or subtracting in scientific notation, you must express the numbers as the same power of 10. This will often involve changing the decimal place of the coefficient.
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.