Expressions
5 x N= 25
5
14 - 2 x 7
0
What does P stand for?
Parenthesis ()
What did they do wrong and what is the real answer?
9 - 3 x 2
6 x 2
12
Correct answer is 3.
Do multiplication then subtract, not - then x.
Prime or Composite?
11
Prime
What is the expression?
the difference between the number T and 12
T - 12
7 + (2 x 4) - 1
14
What does E stand for and what does 5th grade use it for?
Exponents and brackets []
6 - 5 + 7 - 3 x 2 What is the right answer?
6 - 5 + 7 - 6 Where did they go wrong?
6 - 12 - 6
6 - 6
0
Just go from Left to right when adding and subtracting.
Adding does not always go before subtracting
49
Composite
What is the expression?
12 more than 8 times a number p
8 x t + 12
31-(75 / 3) / 5
26
What does M and D stand for?
Multiplication and Division
(10 / 2 x 5) x (16-8)
(10 / 10 ) x ( 16 - 8)
1 x (16 - 8)
1 x 8
8
Right Answer: 200
Multiplying and dividing you go from left to right.
Multiplying does not do first. You do what you see first with multiplying and dividing.
Are all of these prime or composite?
2, 29, 43, 61
Prime
Which expression shows a quantity of rolls, r, added to 8 bagels?
a. 8 - r
b. 8r
c. 8 + r
d. r / 8
c
(5 x 4) – 6 ÷ 2 + 9
26
What does A and S stand for?
Adding and Subtracting
85 - 10 / ([ 2 + 3 ] x 1 x 2 )
85 - 10 / (5 x 1 x 2 ) What is the real answer?
85 - 10 / (5 x 2) What went wrong?
75 / ( 5 x 2 )
75 / 10
7 R 10
Right answer: 84
Had to do the ( ) first
Subtracting was the last thing you had to do, Multiply 5 x 2 before subtracting
Are they all Prime or composite?
100, 31, 55, 79
what is the expression?
3 less than the quotient of 24 divide by A
24 / A - 3
4 – 3[4 –2(6 – 3)] ÷ 2
7
What is the acronym for PEMDAS?
Please Excuse My Dear Aunt Sally
14 + 5 [6 – (2 + 3)]
19 [ 6 - ( 2 + 3 )] What went wrong?
19 [ 6 - 5 ] What is the right answer?
19 x 1
19
Right Answer = 20
Had to do the () first, not subtract
Are these prime or composite?
15, 9, 51, 63
Composite