Simplify Fractions is a free printable Grade 4 maths worksheet on running equivalence backwards, aligned to Common Core standard 4.NF.A.1. It prints 12 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 25 of 25 · the same problems every time you open this link.

One paper per pupil

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Simplify Fractions

4.NF.A.1

NameDate

Work out each answer.

1.25/35 = ___ in its simplest form

2.4/24 = ___ in its simplest form

3.12/36 = ___ in its simplest form

4.3/6 = ___ in its simplest form

5.12/18 = ___ in its simplest form

6.8/16 = ___ in its simplest form

7.15/25 = ___ in its simplest form

8.12/15 = ___ in its simplest form

9.4/16 = ___ in its simplest form

10.3/18 = ___ in its simplest form

11.4/36 = ___ in its simplest form

12.6/14 = ___ in its simplest form

LessonPrint · 4.NF.A.1 · Set 25 · free to copy for classroom use

Answer key — Simplify Fractions

Set 25. Prints on its own sheet.

1.5/7
2.1/6
3.1/3
4.1/2
5.2/3
6.1/2
7.3/5
8.4/5
9.1/4
10.1/6
11.1/9
12.3/7

Last reviewed 2026-09-05. Aligned to 4.NF.A.1 of the Common Core State Standards for mathematics.