you should use addition in a problem involving fractions if you see key words that mean to add, for example sum increase, altogether, etc
You should use subtraction to solve a problem involving fractions when you need to determine the difference between two quantities. This could involve finding how much more one fraction is than another or calculating a remaining amount after taking away a certain fraction. Additionally, subtraction is appropriate when combining fractions that represent parts being removed from a whole. Always ensure the fractions have a common denominator before performing the subtraction.
You should be familiar with long division involving decimals
When performing calculations involving addition, the result should be rounded to the same decimal place as the least precise number being added. For multiplication and division, the result should have the same number of significant figures as the least precise number in the calculation.
When performing calculations involving significant figures in both multiplication and addition operations, ensure accuracy by following these steps: For multiplication and division, the result should have the same number of significant figures as the measurement with the fewest significant figures. For addition and subtraction, the result should be rounded to the same decimal place as the measurement with the fewest decimal places. By applying these rules, you can maintain the accuracy of your calculations involving significant figures.
It depends on the exact nature of the problem.
21
It means you should invent a short problem (story) where an addition has to be made.
The statement is false.
When performing addition and subtraction operations with measurements of different significant figures, the result should be rounded to the same number of decimal places as the measurement with the fewest significant figures.
False
This is false. (I got this question on my test.)
The answer to an addition, subtraction, multiplication, or division of fractions should always be expressed in its simplest form. This means that the numerator and denominator should be reduced to their lowest terms, ensuring that there are no common factors other than 1. Additionally, when adding or subtracting fractions, a common denominator must be found first.