Order Of Operations
When solving order of operation problems students would use PEMDAS. What does PEMDAS stand for?
Parenthesis, Exponents, Multiplication, Division, Addition, and Subtraction
When solving problems with exponents, such as 52, does it mean 5x2 or 5x5?
What is 5x5
a + 7 ; when a = 11
What is 18
Can you add 4b + 2
No, because they are not like terms. 4b is a coefficient and 2 is a constant term.
We also are not told what b equals so we cannot substitute any number in for b to get a real answer
2(s + 4)
What is 2s + 8
12 - 3 x 4
What is 0
3^2
What is 9
mn ; when m = 2 and n = 7
What is 14
9r - 4r
What is 5r
10(9 - x)
What is 90 - 10x or -10x + 90
7 + 54 ➗ 3(2)
What is 16
92
What is 81
z + y - y ; use y =4 and z = 5
What is 5
7x + 16 + 9x
What is 16x + 16
-4(6 + 3r)
-24 - 12r
13 - (-7) + 62
What is 56
(-10)2
What is 100
z + b + m ; use z = -10, b = -5, and m = 7
What is -8
47k - 56 + 47k - 56
What is 94k - 112
-(-w - 3)
What is w + 3
24 - 4^2 * 3 + 15
What is -9
-(13)^2
What is -169
q - m2q ; use m = 5 and q = -2
What is 48
-12c - (-3c) - 6 - (-11)
What is -9c + 5
-7a + 6(a - 7)
What is -a - 42