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Definition
An addition problem or its answer
I.e. The sum of 2 and 3 is 5. |
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| A subtraction problem or its answer |
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| A Multiplication problem or its answer |
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Definition
| A division problem or its answer |
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Definition
less than 90 degrees
(As in an acute angle) |
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Definition
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Definition
the opposite of a number...
Additive inverses or opposites add up to zero. For example, 3 and -3 are additive inverses since 3+(-3)=0. |
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| What is the difference between an equation and an expression? |
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Definition
Expressions use numbers, variables, and symbols to represent a single number. They don't have equals signs or inequality signs.
Equations and inequalities compare two numbers or expressions.
2+4 ----> expression.
2+4=6 ----> equation
2<4 ----> inequality |
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Definition
An expression that contains variables
I.e. 3x - 2
(notice there is no equals sign;) |
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| Associative Property of Addition |
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Definition
(a+b)+c=a+(b+c)
Associative means you can change the grouping, but NOT the order. |
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| Associative Property of Multiplication |
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Definition
(ab)c=a(bc)
When multiplying (or adding), you can multiply (or add) the first two numbers first or the last two first. It doesn't matter. |
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Definition
A group of math symbols that represent a single number.
(NO equals sign!!!) |
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Definition
an expression that has no variables
(We SIMPLIFY expressions.) |
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Definition
expression = expression
(We SOLVE equations.) |
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Term
| Commutative Property of Addition |
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Definition
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| Commutative Property of Multiplication |
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Definition
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| Associative Property for Subtraction |
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Definition
| Subtraction is NOT associative. |
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Definition
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| Commutative Property of Division |
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Definition
| Division is NOT commutative! |
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Term
| Why can't you divide by the additive identity? |
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Definition
| Because the additive identity is 0, and division by zero is dangerous and forbidden. |
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