Word Stuff
Give the correct order of operations.
Parentheses, Exponents, Multiplication OR Division, Addition OR Subtraction
9 - 3 x 2=12
Correct answer is 3. Do x then -, not - then x.
14 - 2 x 7
0
Liam buys 3 packs of pencils. Each pack has 4 pencils. Then he finds 5 more pencils in his desk.
How many pencils does Liam have altogether?
(3 × 4) + 5
Why is it important to know PEMA as a mathematician?
So everyone can solve every problem the same (correct) way.
A bakery makes 6 trays of cookies. Each tray has 8 chocolate cookies and 2 sugar cookies.
How many cookies did the bakery make in total?
6 × (8 + 2)
Why do we say PEMA and not PEMDAS?
Multiplication and Divsion / Addition and Subtraction happens left to right in a problem.
6 ÷ 3 x 2= 1
You multiplied before you divided. You need to work left to right.
Sofia reads 12 pages each day for 4 days. Then she reads 10 more pages for review.
How many pages did Sofia read?
(12 × 4) + 10
Tell what 5 3 really means.
It means 5 x 5 x 5
4 + 5 + 7 - 3 x 2 = 26
You need to follow PEMDAS and do x first. Correct answer is 10.
((5 × 12) + 18) ÷ 6
13
Each table already has 3 markers. A teacher buys 36 markers and divides them equally among 6 tables.
How many markers does each table have now?
3 + (36 ÷ 6)
The problem was 20 - 5 x 2 + 3. My answer was 33. What did I do wrong?
I went from left to right without using the correct order of operations.
10 3 = 30
10 3 = 10 x 10 x10, which is 1000, not 30.
{4 × [6 + 3] + 12} ÷ 6
8
For a school carnival, volunteers pack snack bags. They fill 5 boxes with 12 bags each. Then they add 18 extra bags to the total number of bags. The bags are shared equally among 6 classrooms.
How many snack bags does each classroom receive?
((5 × 12) + 18) ÷ 6