Vocabulary
A(n) ______ is used in a mathematical sentence to show that two expressions are equal.
equal sign
k = 26
f - 20 = 40
f = 60
12v = 36
v = 3
5/6 x = 5/14
x = 3/7
Bethany bought a box of markers. She gave 6 markers to her friend. If Bethany now has 52 markers, how many markers were in the box she bought?
58 markers
The ____ of 2x = 10 is 5.
a. product
b. sum
c. solution
solution
w + 62 = 90
w = 28
c - 39 = 82
c = 121
25v = 100
v = 4
t/11 = 44
t = 484
Isaiah earned 96 points on his math test. This is 11 points more than the number of points he earned on his history test. WRITE and SOLVE an addition equation to find the number of points Isiah earned on his history test.
h + 11 = 96
h = 85 points
The ____ Property of Equality states that if you divide both sides of an equation by the same nonzero number, the two sides remain equal.
Division
25.3 = s + 6.2
p - 15 = 30
p = 45
12d = 216
d = 18
b/14 = 8.3
b = 116.2
After buying a jacket that cost $47, Marilyn had $6 left in her wallet. Write an solve a subtraction equation to find the amount of money Marilyn had in her wallet before she bought the jacket.
m - 47 = 6
m = $53
Multiplication and division are _______.
inverse operations
y + 3/8 = 3/4
y = 3/8
a - 45 = 91
a = 136
71.5 = 5.5u
u = 13
x/3 = 15
x = 45
Samantha brought a bucket of shells home from the beach. She gave 12 shells to her brother. If she now has 47 shells, how many shells did she bring home from the beach?
59 shells
The ____ Property of Equality states that you can add the same number to both sides of an equation, and both will remain equal.
Addition
p + 75 = 100
p = 25
f = 60
7.8x = 23.5
x = 3
53 = r/4
r = 212
Enzo picked 56 strawberries at a farm. This is 25 more than the number of apples he picked. Write and solve an addition equation to find the number of apples Enzo picked.
a + 25 = 56
a = 31 apples
What is the difference between an equation and an expression.
Equations have equal signs and the express doesn't.
y + 54 = 80
y = 26
c - 39 = 82
c = 121
13g = 156
g = 12
3/7 d = 5/14
d = 5/6
Tina noticed that she had taken notes on 25 pages of her notebook. Ninety-five pages were still blank. Write and solve a subtraction equation to find the total number of pages in the notebook.
p - 25 = 95
p = 120 pages
24.8 = t + 5.1
t = 19.7
m - 47 = 6
m = 53
99.2 = 6.2y
y = 16
w/12 = 7.6
w = 91.2
y + 4/9 = 2/3
y = 2/9
h - 4 = 28
h = 32
8.3x = 41.5
x = 5
x/2 = 20
x = 40
y + 3/8 = 3/4
y = 3/8
34 - x = 14
x = 20
12v = 36
54 = r/3
r = 162