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How many different ways can you add and subtract whole numbers numbers to equal 15?
Wiki User
∙ 11y ago
I have my own formula for this. We, together with my friend Gio made an investigative report concerning this. The formula that we got is (2n-1 - 1), where n is the number we are looking for how many addends it has. Let's try. If n is 1: its addends are o. There's no two or more numbers that we can add to get a sum of 1 (excluding 0). Let's try a higher number. Let's try 4. 4 has addends: 1+1+1+1, 1+2+1, 1+1+2, 2+1+1, 1+3, 2+2, 3+1. Its total is 7. Let's check with the formula. 24-1 = 23 - 1= 8-1=7.
Let's try 15. 215-1=14 - 1 = 16384 - 1 = 16383. Therefore, there are 16383 ways to add numbers that will equal to 15.
(Note: Addends are positive numbers only.)
(You can try other numbers, to check whether our formula is correct or not.)
In subtraction, it's infinite. Since, we can assume 45-30, 12345-12330, ...and so on and so far. That's why it's infinite.
Wiki User
∙ 11y ago
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Is the difference of two whole numbers always a whole number?
No. You can subtract two whole numbers and get a negative result. Whole numbers can't be negative.
How do you subtract mixed numbers with regrouping?
you take away one of the whole number=then you add or subtract your fractions=
How is adding and subtracting decimals similar to and different from adding and subtracting whole numbers?
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.
How would you add or subtract fractions with like denominators?
The same way you would add or subtract whole numbers, leaving the denominators alone.
How do your borrow from a whole number when subtracting fractions?
A mixed number has a whole number and a fraction. A fraction is a number that is less than whole and that has a denominator underneath a numerator. To add or subtract mixed numbers, add or subtract the fractions, then add or subtract the whole numbers. If the fraction portion of a mixed number, such as 2 5/6, is more than the fraction portion of the mixed number you're trying to subtract from, such as 3 1/6, you must borrow from the whole number of the mixed number you're trying to subtract from to make its fraction bigger... Please comment on my answers I do not have a Facebook account...
Why are different whole numbers not always a whole number?
Different whole numbers are always whole numbers, but I suspect you meant to ask about the difference between whole numbers. You can subtract two whole numbers and get a negative result. Whole numbers can't be negative.
How do you subtract decimal numebrs?
If you can subtract whole numbers you can subtract decimals. Forget about the decimal for a sec and subtract the numbers as if they were whole numbers. 2.5 -1.4 =1.1 hope this helps and if not yahoo usually has good examples.
How do you subtract whole numbers by fractions?
Simplify them.
What is the Product of two whole numbers?
The product of two whole numbers depends on what the numbers are. The operation is multiplication.11 and 8. You find the factors of 88 first. Then find which 2 will subtract to equal 3
Is the difference of two whole numbers always a whole number?
No. You can subtract two whole numbers and get a negative result. Whole numbers can't be negative.
When you subtract fraction with whole numbers and you have to borrow them can you borrow the whole number twice?
No.
How do you subtract mixed numbers with regrouping?
you take away one of the whole number=then you add or subtract your fractions=
When two whole numbers are subtracted does it affect the difference?
When you subtract one number from another, the result is called the difference. What does your question mean? If by "when two whole numbers are subtracted" you mean that you subtract one whole number from the minuend, and then you subtract another whole number from the difference, then the answer you get is another difference. In effect, you have one minuend and two subtrahends.
How is adding and subtracting decimals similar to and different from adding and subtracting whole numbers?
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.
What are two consecutive whole numbers that are equal to 20.5?
Not possible, two whole numbers can't equal to a number with a half.
How do you subtract whole numbers with fractions?
Turn the proper fraction into an improper fraction.
What are the 4 fundamental operations on whole numbers?
add, subtract, multiply, divide
