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What are the factors of subtraction?
Finding the difference of two numbers is known as subtraction.
Is the difference of two positive numbers positive?
The difference between two numbers is the result of a subtraction. This can be either positive or negative, depending on which number is greater.
Is natural numbers a closed set under subtraction?
No.A set is closed under subtraction if when you subtract any two numbers in the set, the answer is always a member of the set.The natural numbers are 1,2,3,4, ... If you subtract 5 from 3 the answer is -2 which is not a natural number.
Are natural numbers closed for subtraction?
No. A simple example is 5 - 6 = -1. Two natural numbers (5 and 6) are used to subtract to -1 (which isn't a natural number).
How did the ancien egyptians divide two whole numbers?
By repeated subtraction. For example 21 divided by 2 : you can take away 2 ten times and you are left with a half of two, so answer ten and a half. They probably assembled tables of divisions.
