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Lesson 10-1Order of Operations
November 11, 2015
Today’s Supplies Grading Pen
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Process Standard:5.4E – Describe the meaning of parenthesis and brackets in a numeric expression
5.4F – Simplify numerical expressions that do not involve exponents, including up to two levels of grouping.
Standard:5.1G - display, explain, and justify mathematical ideas and arguments using precise mathematical language in written or oral communication.
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VocabularyNumerical Expression
A combination of numbers and operations
Order Of Operations The rules that tell you the order to solve the operations in a math problem.
HINT: All the following mean to multiply!!
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Evaluate: 4 + 24 ÷ 2 – 5 x 3 + 7
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Many years ago, mathematicians around the world came up with different answers to the same problem just as we did. The mathematicians met and agreed on a standard order in which to perform the operations in a problem, so that everyone would get the same answer to a particular problem. This order was accepted as the standard by all mathematicians.
We call this the “order of operations”.
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VIDEO:
http://www.youtube.com/watch?v=d0xutl2sUt0
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Steps:
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1. Find the value of the expression 6 + 3 × 9.
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2. Find the value of the expression 3 + 5 × 9.
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3. Find the value of the expression 4 + (10 – 3).
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4. Find the value of the expression 21 – 6 + 9.
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5. Find the value of the expression 90 ÷ 3 + (3 – 2) – 20.
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6. Find the value of the expression 85 ÷ 5 + 14 × (12 – 8).
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7. Find the value of the expression 64 + 5 × 2 – 1.
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8. Find the value of the expression
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9. Find the value of the expression
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10. Find the value of the expression
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Evaluate: 4 + 24 ÷ 2 – 5 x 3 + 7Was your answer correct?
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Order of Operations ws #1