Fix My Mistake
9 - 3 x 2 = 12
9 -3 x 2 = 3
Give the correct order of operations.
Parenthesis, Exponents (still correct if step not included), Multiplication/Division, Addition/Subtraction
3 + 6 x 4
27
(14 + 6) x (12 -4) -9
151
the sum of 9 and 3 divided 3
( 9 + 3) ÷ 3
Move the decimal when adding and subtracting decimals. Line up the decimal when multiplying and dividing.
False. Line up when adding and subtracting only.
What is the saying we use to remember the correct Order of Operations?
Please Excuse My Dear Aunt Sally
or
Pass My Dad A Sandwich
25 ÷ 5 -2
3
(15 - 5) x 10 + 3
103
y- axis
(-2, 4) is in Quadrant III on the coordinate plane and (-7, -7) is in Quadrant IV.
(-2, 4) is in Quadrant II. (-7, -7) is in III.
What is this called?
4 x (3 + 5)
numerical expression
12 - 8 ÷ 2 + 3
11
6 x 8 + ( 7 - 6 )
49
Write 8 x 8 x 8 x 8 x 8 x 8 x 8 x 8 x 8 x 8 in
8^10
0.0004 = 4/1,000
0.0004 = 4/10,000
left to right
20 ÷ (8-3) + 16
20
( 10 + 19 -5 ) x 2
48
Solve 39.6 / 2.2.
18
The problem was 20 - 5 x 2 + 3. My answer was 33. What did I do wrong?
I did not multiply first. The answer should be 13.
Why is it important to know PEMDAS as a mathematician?
So that everyone is solving the problem in the same way
Write the problem on the board
10
2 x ( 9 x 9 + 2) - 8
158
-27 - (2-8)
-21