Vocabulary
The symbol that shows both sides of an equation are the same
Equal Sign
y - 20 =
y = 65
45
26 = 8 + v
v = 18
14 + 13y = 20y – 21
y = 5
Johnny has 233 watermelons and he eats x. Now he has ten watermelons. What does x equal?
x = 223
A number with a value that is always the same
Constant
38 + d =
d = 16
54
15 + b = 23
b = 8
–15b + 21 + 5b = –19
b = 4
Lee has some boxes and gives five to Shane. If Lee has twelve boxes left, how many did he start with?
17 boxes
A statement that the values of two mathematical expressions are equal
Equation
28 * f
f = 4
112
10n = 40
n = 4
8q + 6 = 4q – 14
q = -5
A supermarket needs 135 pounds of lettuce. If a bag of lettuce weighs nine pounds, how many bags would the supermarket need?
15 bags
The letter that replaces a missing value in an equation
1,238 / z =
z = 2
619
21 = −7n
n = -3
–3(7p + 5) = 27
p = -2
Lilly has 42 green boxes and some blue boxes in her room. If she has 117 boxes total, how many of them are blue?
75 boxes
The correct term for operations that mean the opposite
Inverse Operations
247 * l =
l = 32
7,904
−17x = −204
x = 12
3(x – 4) = 2(–2x + 1)
x = 2
Sarah is starting a lemonade stand. She sells each cup of lemonade for $4.00. If Sarah makes $128 total, how many cups of lemonade did she sell?
32 cups