m + 1 = 3
2
x - 3 = 5
8
x - 12 = 2
14
What is the opposite of addition?
subtraction
y + 9 = 10
1
y - 10 = 10
20
b - 4 = 23
27
What is the opposite of multiplication?
division
t + 27 = 89
62
m - 23 = 123
146
c + 45 = 86
41
True or False
The difference between an expression and an equation is that an expression has an equal sign
FALSE?
Equations have equal signs not expressions.
g + 112 = 245
f - 4.5 = 16.25
20.75
p + 345 = 560
215
What is the first step when solving equations?
to identify the operation being used
x + (8-2) = 6
0
p - 345.34= 216.66
p= 562
g - 87 = 11
98
Natalie spends $77 at the store. She received $23 as her change from the cashier. How much did she pay the cashier?
Natalie gave the cashier $100 to receive $23 back.