Q: A group of students are talking, 2 friends leave the group. Write an expression for the number of students in the group after the 2 leave.

A: R-2

'R' meaning the number of students in the group.

'R' is a variable. I used a variable because the number of students in the group are unknown.

BEDMAS question for February 9, 2012

The answer for today's BEDMAS question is 0.

Meaning of an Expression

zm

Ordering Decimals

Change these scrambled decimals from least to greatest.

Okay let's order decimals from least to greatest.

click here for a link about ordering decimals

A video about ordering decimals

February 8, 2012 Lesson

The definitions learned today...

Variable -A letter that represents an unknown number.

e.g. A,D,M,Z,R

Expression -Any single number or variable, or combination of operations... (-, +, x, /) involving numbers and variables.

e.g. 5, n, 8t, x+1, 2y, -7

1+1=2 -Equation not expression

Value - A known or calculated amount

Constant -A number that does not change and it increases or decreases the value of the expression

Numerical Coefficient -A number that multiples the variable (or a number in front of a variable)

e.g. 2t

(2 being the numerical coefficent and 't' being the variable)

Improper Fractions