Algebra 1: Chapter 1, Lesson 6, page 29.
Writing Expressions
“Many problems can be solved by translating data given with words into algebraic expressions. To do this, you must know which phrases suggest each of the operations (addition, subtraction, multiplication and division).”
There are key words in this lesson and my note card looks like:
- Add – More than; sum of; greater than; added to
- Subtract – Less than;, fewer than; subtracted from; minus; difference of
- Multiplication – Times; product of; multiplied by; “double” means 2 times; half of
- Division – Divided by; quotient of
Whenever you see these type of key words, you can figure out what order operation is being requested!
Two of tonight’s homework problems solved by MrE are here! Just click it!!
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Algebra 1a: Chapter 1, Lesson 4, page 19.
The Associative Property
We discussed the use of the Associative property by re-grouping terms in paranthesis. We also used both commutative and associative properties together to help simplify expressions for evaluation.
We looked for patterns in expressions again to help speed up our mental math computation speed.
Remember, the associative property ONLY holds true for addition and multiplication. Just like the commutative property, it doesn’t work for subtraction or division.
For any numbers a, b, and c, we have in equation forms for adding and multiplication:
`a+(b+c)=(a+b)+c and a⋅(b⋅c)=(a⋅b)⋅c`
Two of tonight’s homework problems solved by MrE are here! Just click it!!