Addition and Subtraction
x + 8 = 10
x = 2
2x = 14
x = 7
x + 1/2 = 3/4
x = 1/4
Anika buys 5 notebooks that contain 60 pages each. Write an equation that represents the total number of pages, p.
5 x 60 = p
p ÷ 5 = 60
Lisa is cooking muffins. The recipe calls for 7 cups of sugar. She has already put in 2 cups of sugar. She needs to put in c cups of sugar.
c = 5
Lisa needs to put in 5 more cups of sugar.
6 + y = 18
y = 12
3a = 39
a = 13
3/5 - j = 1/5
j = 2/5
Tiara buys a pack of paper with 200 pages. She splits the paper equally into 5 binders. Write an equation that represents the number of pages in each binder, b.
200 ÷ 5 = b
200 ÷ b = 5
5b = 200
At a restaurant, Mike and his three friends decided to divide the bill evenly. Each person paid $13. The total bill was t dollars.
t = 39
The total bill was 39 dollars.
54 - a = 13
a = 41
b ÷ 4 = 2
b = 8
0.8p = 0.48
p = 0.6
A plant in Zahra's garden grows 0.8 inches taller each week. After x weeks, the plant has grown 6 inches. Write an equation that could represent this situation.
0.8x = 6
Last week Julia ran 30 more miles than Melanie. Julia ran 47 miles. Melanie ran m miles.
m = 17
Melanie ran 17 miles.
k - 19 = 65
k = 84
90 ÷ z = 5
z = 18
1.8 ÷ 2 = s
s = 0.9
A shirt's original price is $32. It is on sale for 50% of the original price. The new price of the shirt is c dollars. Write an equation to represent this situation.
32 ÷ 2 = c
32 · 1/2 = c
32 · 0.5 = c
Jenny wants to buy an speaker that costs $30.74. She pays the cashier $40. The cashier gives her back b cents in change.
b = 26
The cashier gives Jenny 26 cents or $0.26 in change.
h + 97 = 200 - 45
h = 58
y ÷ 7 = 8
y = 56
x = 20/18 = 10/9
The perimeter of a square is 24 inches. The length of each side of the square is s inches. Write an equation that represents how to find the length of each side.
24 ÷ 4 = s
4s = 24
Declan's mother gives him $13.30 to buy a present. This covers 3/5 of the cost. The present costs p dollars.
The present costs $7.98