Aim 21 Evaluating Expressions and Order of Operations
October 18, 2016
1) Take out last night's HW
Worksheet - Aim 20
2) Copy down tonight's HW
Worksheet - Aim 21
Test - Thursday, October 20th (Aims 2 - 22)
Aim #21: How do we evaluate expressions using
the order of operations?
2
3) Evaluate 6a - b if a = -1 and b = 5
1
Aim 21 Evaluating Expressions and Order of Operations
October 18, 2016
HW Answers
Evaluate the following expressions when x = -2 and y = 4.
a) xy
b) x + y
c) y - x
d) y ÷ x
e) 3y + x
f) xy
g) 2x + 5y
h) xy + y
i) 5y
2
2
2
Aim 21 Evaluating Expressions and Order of Operations
October 18, 2016
Evaluate the following expressions when a = -2 and b = 6.
2
a) 3a - b
b)
a +b
c) 4 + 2(a – b)
d)
10b ÷ 5a
e) 2a + b – a
2
f) b – 3a
3
Aim 21 Evaluating Expressions and Order of Operations
October 18, 2016
Simplify using the order of operations.
a) -6(2) - 3
2
c)
16 ÷ -4(2)
e)
(5 x 4) ÷ (-3 + 2)
2
b)
(2 - 5) - 3(-2)
d)
24 ÷ 8(-1) - (3)
f)
2
(4 – 3 x 2 + 1)
2
4
Aim 21 Evaluating Expressions and Order of Operations
October 18, 2016
Evaluate the following expressions if x = 2, y = 6 and z = -4.
3
b) x + y
2
d) z – y
a) (y + z)
c) xy + z
2
e) y z
2
2
2
3
f) y(x - z)
5
Aim 21 Evaluating Expressions and Order of Operations
October 18, 2016
Evaluate the following expressions if x = -2, y = -3 and z = 8.
a) (z + y)
2
b) 4(y + z)
2
c) y(z + x)
d) y + x
e) 8x + 4y
f) x + 2y
6