EG.
x+2=3 1+1=2 --equation
x+2 is the expression and also is 3
2+3=6-1
--2+3 & 6-1 are both an expression
and the whole thing is called an equation and the whole thing is an equation
y-7=-4 3a-2=a+2
An equal sign (=) doesn't always mean the answer, it can mean it has the same value
2B+1=5
C+4= C=5
5+4
9
2C+3
2 is the numerical coefficient
C is the variable
3 is the constant
Writing Expressions - An expression can be written using a single constant, a single variable or a combination of operations with the constants, variables, or numerical coefficients.
EG.
2y-7
2-numerical coefficient
y-variable
- - operation
7- constant
Write the Equation
C+3=7
Expression - 3C-5
Variable - C
Numerical Coefficent - 3
Constant- 5
Equation - 2C+4=10
Variable - C
Numerical Coefficient - 2
Constant - 4 and 10
HOMEWORK
Show using cups and counters four times a number minus five equals seven write as expression or equation.
I.D variables, numerical coefficients, constants
