Monomials A monomial is an algebraic expression that consists of only one term. (A term is a numerical or literal expression with its own sign.) For instance, 9x , -4a², and 3mpx³ are all monomials. The number in front of the variable is called the numerical coefficient. In -9xy, -9 is the coefficient. Adding and subtracting monomials To add or subtract monomials, followContinue reading “Monomials part 1”

# Tag Archives: signed numbers

## Relative numbers (part 2)

Multiplying Positive and Negatives numbers We can only do arithmetic in the usual way. To calculate 5(−2), we have to do 5· 2 = 10 — and then decide on the sign. Is it +10 or −10? For the answer, we have the following Rule of Signs. Rules of signs Like signs produce a positiveContinue reading “Relative numbers (part 2)”

## Relative numbers (part 1)

Addition and subtraction We can count forwards: 1, 2, 3, 4, …and the question is: if you can go in one way, can you go the opposite way? The answer is: negative numbers Now we can go forwards and backwards as far as we want. + is the positive sign – Is the negative signContinue reading “Relative numbers (part 1)”