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Definition
| The opposite operation used to isolate the variable when solving an equation. Also used to move variables to other side of an equation. |
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Definition
The number next to a variable in an expression or equation. It is a multiplier
Ex: 5y
five is your coefficient. |
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Definition
A number variable or product of both in an equation or expression. Terms in an expression or equation are separated by addition or subtraction symbols.
Ex: 4y + 6x - 12
(this expression has 3 terms)
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Definition
Terms that have the same variable and exponent.
Ex: 8x3 and 2x3
(these are like terms and can be combined)
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Definition
Combination of constants, variables, and products of both. Expressions have no equal sign and can't be solved. They can be simplified using order of operations and combining like terms.
Ex: 4 + 9a - 2b |
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Definition
As statement that two mathematical expressions are equal. An equation must have an equal sign, and can be solved.
Ex: 5x + 2 = 200 |
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Definition
The rules that say which calculation comes first in an expression.
They are:
• do everything inside parentheses first: ()
• then do exponents, like x2, x3 etc
• then do multiplies and divides from left to right
• then do the adds and subtracts from left to right |
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Term
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Definition
multiplying a number by a group of numbers added together is the same as doing each multiplication separately.
EX: 3(2 + 4) = 3×2 + 3×4
So the "3" can be "distributed" across the "2+4" into 3 times 2 and 3 times 4. |
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Term
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Definition
A fixed value. A number on its own
Ex: in "x + 5 = 9", 5 and 9
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