Fourth grade is a big year for fractions. Students learn to make equivalent fractions by multiplying the numerator and denominator by the same number (Common Core 4.NF.A.1), and to compare fractions with different numerators and denominators, often by using a benchmark like 1/2 or by finding a common denominator (4.NF.A.2). They then add and subtract fractions and mixed numbers with like denominators (4.NF.B.3) and multiply a fraction by a whole number (4.NF.B.4).
This set covers all of those skills, from filling in a missing numerator to word problems about pizza and ribbon. Type fractions with a slash, such as 3/4, and mixed numbers with a space, such as 2 3/4. Each answer is checked instantly and explained step by step. A picture helps more than a rule: if a student is unsure, sketch a bar split into equal parts and shade the fractions. That makes it clear why 2/7 + 3/7 is 5/7 and not 5/14, because the size of each part does not change when you add.
Choose an option or type your answer, then press Check. Capital letters and extra spaces do not matter in typed answers, and units are optional.
Answer: A) 4/6
Multiply the numerator and denominator by 2: 2 x 2 = 4 and 3 x 2 = 6, so 2/3 = 4/6. The other fractions are not equal to 2/3.
Answer: 9
4 x 3 = 12, so the denominator was multiplied by 3. Multiply the numerator by 3 too: 3 x 3 = 9. So 3/4 = 9/12.
Answer: D) 5/8
Half of 8 is 4, so 5/8 is more than half. Half of 8 is 4 (3/8 is less), half of 12 is 6 (5/12 is less) and half of 10 is 5 (4/10 is less).
Answer: 5/7
The denominators are the same, so add the numerators: 2 + 3 = 5. The parts are still sevenths, so the answer is 5/7.
Answer: A) 5/10
Subtract the numerators and keep the denominator: 9 - 4 = 5, so the answer is 5/10 (which is the same as 1/2).
Answer: 2 3/4
4 goes into 11 two whole times (2 x 4 = 8) with 3 left over. So 11/4 = 2 wholes and 3/4, written 2 3/4.
Answer: A) 16/5
Each whole is 5/5, so 3 wholes are 15/5. Add the extra 1/5: 15/5 + 1/5 = 16/5.
Answer: 3 5/8 (also accepted: 29/8)
Add the whole numbers: 1 + 2 = 3. Add the fractions: 3/8 + 2/8 = 5/8. The answer is 3 5/8.
Answer: A) 8/5
4 x 2/5 means 2/5 + 2/5 + 2/5 + 2/5. Multiply only the numerator: 4 x 2 = 8, so the answer is 8/5 (or 1 3/5).
Answer: 7/10
Rewrite 3/5 in tenths: 3/5 = 6/10. Now compare 6/10 and 7/10. 7/10 is greater.
Answer: B) 5/8
Add like fractions: 3/8 + 2/8 = 5/8. The pizza is still cut into eighths, so the denominator stays 8.
Answer: 2 (also accepted: 6/3)
6 x 1/3 = 6/3. Three thirds make one whole, so 6/3 = 2.
Answer: C) 3/5
In 2/4, 4/8 and 5/10 the numerator is exactly half of the denominator. In 3/5, half of 5 is 2.5, not 3, so 3/5 is not equal to one half.
Answer: 3/6 (also accepted: 1/2)
Subtract like fractions: 5/6 - 2/6 = 3/6 yard. That is the same as 1/2 yard.
2/7 + 3/7 is 5/7, not 5/14. The denominator names the size of the parts, and that stays the same when you add like fractions.
1/8 is smaller than 1/4, because the whole is cut into more, smaller pieces.
To make an equivalent fraction, multiply the numerator AND the denominator by the same number. 3/4 = 9/12, not 3/12.
4 x 2/5 means four lots of 2/5, which is 8/5. Only the numerator is multiplied; 8/20 is wrong.
Turn fractions into a printable, differentiated worksheet with an answer key, matched to grade 4.
Make a worksheet βBuild a test or quiz on this topic that students answer online and that marks itself, with a class summary for you.
Build a self-marking test βStep-by-step help, quizzes and test-style practice in a safe, parent-managed student portal.
Open the student portal βEither rewrite them with a common denominator and compare the numerators, or compare each one to a benchmark such as 1/2 or 1.
Simplifying is not required by the 4th grade standards, but recognizing equivalent fractions such as 3/6 = 1/2 is, so both forms are accepted here unless a question asks for one form.