Worked examples
Two examples
Example 1
5 14 − 2 34 =
- 14 is less than 34, so borrow 1 from the 5: it becomes 4, and 4 54 is the same amount (one whole is 44).
- Wholes: 4 − 2 = 2. Fractions: 54 − 34 = 24 = 12.
Answer: 2 12
Example 2
6 − 1 25 =
- 6 has no fraction, so borrow 1: 6 is the same as 5 55.
- Wholes: 5 − 1 = 4. Fractions: 55 − 25 = 35.
Answer: 4 35
Where this is taught: Quiz 10: Adding and Subtracting Fractions, “Mixed numbers: carrying and borrowing again”
The drill
Ten problems
This drill also has challenge problems. They use the same skill, set up the way the GED test sometimes sets up a problem, so that it looks new at first.
How many:
Type a fraction with a slash, like 3/4, and a mixed number with a space, like 2 1/4. Give answers in simplest form. Then press Check my answers at the bottom.Write each answer on the line, in simplest form. The answer key, with the reasoning, is on the last page.