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
10÷5 x 2 = 1
10÷5 x 2 = 4
These are the only two mathematical operations that are not paired with another operation.
Brackets and Exponents
25 ÷ 5 -2
3
(15 - 5) x 10 + 3
103
Liam thinks the answer to 12 + 3 × 5 is 75. Is Liam correct?
No, Liam added first! The answer is actually 27.
5 x 5 +1 = 30
5 x 5 + 1= 26
A class sells 24 boxes of chocolate bars for $8 each. They spend $35 on advertising. How much money do they make altogether?
(24 × 8) − 35 = $157
12 - 8 ÷ 2 + 3
11
6 x 8 + ( 7 - 6 )
49
A student buys 2 movie tickets for $12 each and 3 bags of popcorn for $5 each. If they have $50, how much money will they have left?
50 − (2 × 12 + 3 × 5) = $9 remaining
4 + 5 + 7 - 3 x 2 = 26
4 + 5 + 7 - 3 x 2 = 10
If I have addition and subtraction in my expression, I should move from ______ ___ _______.
left to right
20 ÷ (8-3) + 16
20
( 10 + 19 -5 ) x 2
48
Three teams score 18 points each in the first round. In the second round, they score 12 more points each. What is the total number of points scored?
(3 × 18) + (3 × 12)
= 54 + 36
= 90 points scored
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 BEMDAS as a mathematician?
So that everyone is solving the problem in the same way
7 + 3 x (8 ÷ 4)
13
2 x ( 9 x 9 + 2) - 8
158
A player earns 50 points for completing a level and 20 points for each treasure they collect. If they collect 4 treasures and then lose 15 points for a mistake, how many points do they have?
50 + (4 × 20) − 15
= 50 + 80 - 15
= 115 points