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Published byGregory Record Modified over 8 years ago

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Pgs 137-142

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What’s the answer? 6 + 4 x 4 – 3

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Order of Operations Hopefully you remember this: BEDMAS Brackets, Exponents, Divide, Multiply, Add, Subtract

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B – Do the operations in brackets first E – Next, evaluate any exponents D M A S Then, divide and multiply in order from left to right Then, add and subtract in order from left to right

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Brackets Just be aware brackets can look like any of these.

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Exponents This will be our next unit, so we will just review the basics This is what you should know already: 3 2 Exponent Base Power 3 is the base 2 is the exponent 3 2 is the power 3 2 is a power of 3

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Exponents Remember that 3 2 means that we have 3 units by 3 units AKA 3 x 3 = 9 3 3 3 x 3 = 3 2 = 9 9 is a square number

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Exponents 5252 = 5 x 5= 25 5 5

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Watch your negatives With rationals we have to be careful with negative numbers. With brackets (-4) 2 = (-4)(-4)= +16

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If there are no brackets…

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With decimals (0.5) 2 = (0.5) x (0.5)= 0.25

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B – Do the operations in brackets first E – Next, evaluate any exponents D M A S Then, divide and multiply in order from left to right Then, add and subtract in order from left to right

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Example 1 Brackets first. Then evaluate the power Then multiply Add

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Subtract in the brackets first Use a common denominator of 8 To divide, multiply by the reciprocal of -5/16 Example 2

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Example 3 The formula converts temperatures in degrees Fahrenheit, F, to degrees Celsius, C. What is 28.4°F in degrees Celsius? Substitute F = 28.4 in the formula SOLUTION

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Homework Page 140-142 3, 4, 7, 11, 12

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Now with Rationals

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A harder example

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