Subtracting Fractions with Like Denominators
Both fractions share a denominator and the first is always larger, so every answer is a positive fraction under 1. Subtract the numerators, keep the denominator, simplify. The key gives lowest terms, so 6/8 − 2/8 shows as 1/2, which is where most of the marking disagreements happen; decide in advance whether you require simplified answers.
Halves to tenths.
Ready-made PDFs
One-click downloads, answer key included, a different puzzle in each.
FAQ
Can the answer be zero or negative?
No. The first numerator is always at least one more than the second, so results run from 1/d upward and never reach zero.
How are the answers written on the key?
In lowest terms, and as a mixed number when the result is more than 1 (7/4 shows as 1 3/4). If a student writes an unsimplified but correct fraction, that is a teaching moment rather than a wrong answer; the key shows the form most rubrics expect.
Can students work these on a tablet?
Yes. Practice online puts a pen tool over the same sheet, so the fraction can be written with a stylus or finger and wiped for another try.
How do I print this subtracting fractions worksheet?
Click Download PDF and print at 100% scale. The page is already sized for US Letter with printer-safe margins, so no fit-to-page fiddling is needed.
Should I require simplified answers?
Many third grade programs accept 4/8; by fourth grade most expect 1/2. The key shows 1/2. Tell students which you want before they start.
What does the Denominators control change?
The largest denominator the generator may use: 6, 10 or 12. Smaller denominators keep the numbers friendly for a first pass; 12 brings in sevenths, ninths and elevenths, which force the general method instead of pattern-spotting.
Can I get different versions for each student?
Turn on the 5 versions switch before downloading. You get five different sheets in one PDF, each with its own answer key, so neighbouring desks cannot copy.