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Q: What is the first thing you should look for when adding or subtracting fractions or mixed numbers?

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It will help when you are adding and subtracting fractions.

For adding or substracting fractions first of all we should calculate the LCM( Lowest Common Multiplier) of the denominators in both of the fractions.

You do by subtracting one from the previous number and adding 10 to the top number of the digits you are regrouping. Subtract those two digits and you should get your answer.

yes you should use a common denominator when subtracting with fractions, it makes it much easier.

the answer is that you should get a LIFE!

You write down the numbers you want to add and subtract, making sure the decimal points are aligned. Then, you add (or subtract) EXACTLY as you would add or subtract integers. The decimal point in the solution should be aligned with the decimal points in the original numbers.

Whole numbers are rational numbers with a denominator of 1. The difference with general rational numbers is that the denominators are likely to be different and they must be made the same by converting the fractions into equivalent fractions with the same denominator before the addition can be done - by adding the numerators and keeping the denominator, and simplifying (if possible) the result. With whole numbers the denominators are already the same (as 1) and so the addition can be done straight away.

Convert the fractions into equivalent fractions with the same denominator. In actually adding mixed numbers, it is easier to convert the mixed numbers into improper (top heavy) fractions, do the addition, simplify the resulting fraction and convert any resulting improper fraction back into a mixed number.

as many as needed to satisfy the accuracy needed.

Yes, When Adding and Subtracting decimals you should line up the decimals. You need to keep each place value in the same column, the same as when you add whole numbers you keep the ones column lined up, same for the tens, etc. Lining up the decimal points makes sure that the tenths column is kept together, same for the hundredths, and so on.

When adding decimal numbers, the decimal points should be lined-up.

subtraction is merely adding a negative number, so subtracting a negative number is adding the negative of a negative number. It should be pointed out that while most people find this concept obvious, it was not obvious to ancient mathematicians. In fact, as late as the 1800s, most mathematicians thought that negative numbers were nonsense.

switch numbers and multiply you should know that

Neither. Prime number or composite numbers should be whole numbers, not fractions.

There isn't a universal answer to all problems. What you should try to do is find the lowest common denominator between the fractions you are adding.

grade 5 maths should be adding numerator and denominator.converting deciamals to fractions.

It can be helpful for people who do not have a clue where the decimal point should go in the answer. For those who do know, the exercise is pointless.

When dividing fractions and mixed numbers, the most important step is to convert the mixed number into a single fraction. E.g. 1, 1/3 should be written as 4/3.

Good fractions for children that are nine-years-old or younger are fractions that use only single digit numbers. Also, the fractions should be in the most reduced form.

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Doing that makes the numbers smaller, so it is easier.

I personally would convert them to improper fractions, add them and then convert the result back to a mixed number. However, if you want to add the parts separately, it would be better to add the fractions first as this could result in a carry of a whole number to add into the addition of the whole numbers. eg 2 1/3 + 3 5/6 Adding fractions and whole numbers separately: Fractions: 1/3 + 5/6 = 2/6 + 5/6 = 7/6 = 1 + 1/6 = 1/6 + (carry to the whole numbers) Whole numbers: 2 + 3 + (carry) = 2 + 3 + 1 = 6 → 2 1/3 + 3 5/6 = 6 1/6 Done as improper fractions: 2 1/3 + 3 5/6 = (2x3+1)/3 + (3x6+5)/6 = 7/3 + 23/6 = 14/6 + 23/6 = 37/6 = (6x6+1)/6 = 6 1/6

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To use an adding machine put in tape and enter the numbers that need to be added or subtracted. Work should be checked at the end.