-10 is 'higher up' on the number line than -15, so it is greater. Think of a thermometer. Which is warmer -10° or -15°. Or suppose you are diving in water. Which is 'higher up' 15 feet below the surface (-15) or 10 feet below the surface (-10).
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10>-9 (ten is greater than negative nine)
No because -10 is less than -1
It's either positive or negative depending on the number that is greater than the second number. Example subtract 10 from 20 the answer is 10. 20 as being the greater than 10. Another example subtract 5 from -10 the answer is -15. -10 as being the greater than 5. Take note when subtracting positive and negative integers you change the sign of the subtrahend.
No. All positive numbers are greater than zero and all negative numbers are less than zero. Therefore, all positive numbers are greater than all negative numbers. That said, there is a such thing as absolute value, which is how far a number is from zero. For example the absolute value of -10 is 10. The absolute value of a negative number can be greater than that of a positive number.
Please consider the following two facts: A negative number to an even power is positive; but a negative number to an odd power is negative. Any positive number is greater than any negative number.