Order of operations
What does "PEMDAS" stand for?
P = parentheses E = exponents M = multiplication D = division A = addition S = subtraction
3(y + x)
use x = 4, y = 0
3(4) =
12
Calculate: 4(3 + 2)
4(5) =
20
4(x)
x = 12
4(12) =
48
What does 8^2 (8 to the power of 2) mean?
8 times itself, or 8*8, or 64.
4 + xy
use x = 7 and y = 3
4 + (7)(3) =
4 + 21 =
25
5(3 + x)
use x = 3
5(3 + 3) =
5(6) =
30
-3y
use y = -3
-3(-3) =
9
In the expression 6(7 + 9), which step should we start with according to PEMDAS?
7+ 9 = 16
8(5 - x) - y
use x = 3 and y = 12
8(5 - 3) - 12 =
8(2) - 12 =
16 - 12 =
4
x(2 + y)
use x = 1, y = 7
1(2 + 7) =
9
x^4
use x = 1
1
t/18
use t = 0
0/18 =
0
Solve: 5(4^2 + 3)
5(16 + 3) =
5*19 =
95
(c + d) + 4(c)
use c = 8, d = 9
(8 + 9) + 4(8) =
17 + 32 =
49
x(y - 8)
use y = 18, x = 10
10(18 - 10) =
10(8) =
80
x(y^2)
use x = 3, y = 5
3(5^2) =
3(25) =
75
(5y - y)/2
use y = 6
((5)(6) - 6)/2 =
(30 - 6)/2 =
24/2 =
12
Solve: 3(x + 9) - 3
use x = 4
3(4 + 9) - 3 =
3(13) - 3 =
39 - 3 =
36
5(f - h) - 2h
use h = –1, f = 2
5(2 - -1) - 2(-1) =
5(2 + 1) + 2 =
5(3) + 2 =
17
u(w - 8)
use u = 7, w = -3
7(-3 - 8) =
7(-11) =
-77
y(y ^ 3) + x
use x = 3, y = 2
2(2^3) + 3 =
2(8) + 3 =
16 + 3 =
19
(50 + g)/g
use g = 10
(50+10)/10 =
60/10 =
6