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How is addition like subtraction?
Well, technically, addition and subtraction are opposites. if you add two numbers together, then you take one and put the other with it. if you subtract two numbers, you take one away from the other. if you are adding or subtracting decimals, then make sure that the decimals are lined up. Fractions have some different rules.
How do bankers use adding and subtracting?
To count money, they have to multiply. When the multiplication is finished they have to add the products together. When some one deposits or withdraws money, the banker uses adding and subtracting to find the new balance of the account.
Why do you need a common denominator when adding and subtracting fractions but not when you multiply or divide fractions?
For subtracting and adding you cannot add or subtract unalike things. For multiplication and division you can multiply by whatever you want. In some maths you even multiply by variables such as "x". Or divide by them.
What are some of the rules to follow with decimals?
1. When adding, the decimals MUST line up: 012.3 +32.1 2. When multiplying, you dont have to put the decimals side by side: 12.3 x323.55 Then you count how many numbers are after the decimals, which, in this case, is three. Hope it helped!
What is some examples of adding and subtracting radicals?
When adding and subtracting radicals, you can only combine radicals with the same index and radicand (the number inside the radical). Here are some examples:
