The bottom number in a fraction

The difference between a starting time and an ending time

All whole numbers (both positive and negative) and zero., ...-3,-2,-1,0,1,2,3...

Numbers greater than zero

numbers less than zero

.quantity multiplied with others: one of two or more numbers or quantities that can be multiplied together to give a particular number or quantity

A mathematical sentence that contains an equals sign.

Answer to a multiplication problem

Answer to a subtraction problem

Answer to an addition problem.

The order doesn't matter (a+b = b+a) (a•b = b•a)

(a+b)+c=a+(b+c)