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Why does a 4 digit number take away another 4 digit number equal a multiple of 9?
It doesn't always. It's true only if the 4-digit numbers are mirror images of each other.
How do you divide three digit numbers by two digit numbers?
You see how many times the two digit number goes into the first two numbers then you will take them away and then you will get the third number and put it on the end of your answer then you will see how many times your two digit number goes into your new number and then you will get your answer. And by the way I am eleven and I am still in primary school so you should really know it. I can divide a two digit by a seventeen digit number and that ins easy peasy.
Why is a negative number minus a positive number always negative?
Because if the number is already negative and you take away more it will be even farther away from being positive. I hope that makes sense!
When you round a number what should you do with the digit to the right?
Throw it away. That's what rounding means.Before doing so, though, depending on the rounding method you're using you may need to look at it. In general you round the last digit kept down if the next digit is 0-4, and round the last digit kept up if the next digit is 5-9, but there are some fiddly little details that result in a variety of methods.
What does subtracting mean?
subtraction means you have to take away from the number
