Why do fractions need a common denominator when you add or subtract them?

Leah has two same size rectangles divided into the same number of equal parts. One rectangle has 1/3 of the parts shaded, and the other has 2/5 of the parts shaded. What is the least number of parts into which both rectangles could be divided?

If Walt's scooter can travel 53 miles on 1 gallon of gas, how far can his scooter travel on 2.5 gallons of gas?

Use the drawing tool (s) to form the correct answer on the provided number line. An internet service provider is implementing a new program based on the number of connected devices in each household.

Two consecutive odd numbers have a sum of 92. What are the numbers?

there are 60 students in a speech contest. Yesterday, 2/3 of them gave their speeches. Today, 1/5 of the remaining students gave their speeches. How many students still haven't give their speeches?

X (x-3) = 28 use factoring to solve the polynomial equation

An equation and the steps to solve it are shown below: 3x - one over two (8x - 2) = 4 Step 1: 3x - 4x + 1 = 4 Step 2: x + 1 = 4 Step 3: x + 1 - 1 = 4 - 1 Step 4: x = 3 Which step was the error made and why? A.

What is 39 percent of 120?

A car takes 55.3 seconds to travel 1 mile. How long does it take the car to travel 5.8 miles?

What are the domain and range of the graphed function? 2 4 6 8 10 10 8 6 4 2 7 5 3 1 9 1 3 5 7 9 y x