Adding fractions combines parts of a whole by rewriting both with a common denominator and then adding the numerators.
You can only add like-sized pieces directly — 41 and 31 must be converted to twelfths before adding.
Showing a random 20 of 50 problems.
Example 1
medium
Compute 73+212.
Example 2
easy
Compute 83+82.
Example 3
hard
Solve for x: x+72=43.
Example 4
easy
Compute 51+102.
Example 5
easy
Compute 31+61.
Example 6
medium
Compute 21+31+61.
Example 7
medium
Compute 21+41+61.
Example 8
medium
A bookcase shelf is 43 m wide; an extension is 85 m wide. Total width?
Example 9
hard
Worked example: 1511+127, in lowest terms.
Example 10
easy
Compute 62+61 and simplify.
Example 11
medium
Compute 31+41.
Example 12
hard
Three tanks contain 85, 43, and 31 of their capacity in water. If each tank has a capacity of 120 litres, how many total litres of water are in all three tanks?