1.5
7.2
7
minus (negative) A negative number multiplied or divided by a negative is a positive. Then, multiplied or divided by another negative gives you a negative. A negative added to a negative is a negative. So adding a third negative is still a negative. Subtracting a - from a - is a -. So, subtracting a third - is still a -. No matter what operation you do, three negatives is a negative.
Zero.
Multiplying any number by one has no effect. Half multiplied by one is still a half.
It is not a prime number. Every number is a multiple of one. Its reciprocal is still one, anything multiplied or divided by one is still the original number.
Any composite number multiplied by 2 is still a composite number.
Any number multiplied by zero is equal to zero. Think of it this way - if you have 13 lots of zero, you still have zero. However many lots of zero you have, you have zero.
Simple, an even number multiplied by itself will still equal an even number. Odd number are strange
1
The number 1, to ANY power, is still 1. This is because "to the ... power" means multiplied by itself ... times - and 1 multiplied by itself is always 1.
A number multiplied by zero is always zero because zero is nothing, and if you have, for an example, the number one, and you have one zero times it is nothing. Another example is if you have no money, and i say i will triple all of your money, you will still have no money.