Fractions
Grade 4 · Math
Explore numbers, spot patterns and explain how you worked it out.
Choose a game
Take your time, try a game and collect stars.
Adding and subtracting fractions
Add and subtract fractions with the same denominator within one whole. Free Grade 4 math game.
Play Adding and subtracting fractionsDecimals on a number line
Place tenths and hundredths on a number line. Free Grade 4 math game.
Play Decimals on a number lineSimplifying fractions
Write fractions in their simplest form using common factors. Free Grade 4 math game.
Play Simplifying fractions
Learning about fractions
In this Grade 4 math collection, you can practice Adding and subtracting fractions, Decimals on a number line, Simplifying fractions. Choose a game above for a short activity, or explore the examples below before you play. The full guide for each game explains its controls, gives more examples and includes a free printable for practice away from the screen.
Talk it through
Use counters, a drawing or a number line before moving to a mental method. Ask your child to explain a choice, then change one number and try the method again.
Ask: “How could you show the same answer another way?” Give your child time to explain. Return to an example after playing and ask whether they would approach it differently.
Adding and subtracting fractions
In the game, children balance the scales: they find the fraction that makes both sides equal, such as 2/9 + 5/9 = ? or 2/9 + ? = 7/9. The Quick quiz shows questions such as 2/9 + 5/9 = ? and 7/8 − 3/8 = ? with four answer choices. One wrong choice always shows the classic mistake of adding the denominators as well (2/9 + 5/9 = 7/18). Answers stay within one whole, and if the total is exactly one whole, such as 3/5 + 2/5, the answer is shown as 1.
Try an example: 2/9 + 5/9 = ?
2 ninths + 5 ninths = 7 ninths.
Show the answer
7/9
What to look out for
Adding the denominators: 2/7 + 3/7 = 5/14. Say the fractions in words: 'two sevenths plus three sevenths'. Sevenths stay sevenths, just like 2 apples + 3 apples is 5 apples, not 5 'double apples'.
Decimals on a number line
The game uses two kinds of number line. One runs from 0 to 3 in tenths, with only the whole numbers labeled, for placing numbers such as 1.7. The other runs from 0 to 1 in hundredths, with bigger ticks for each tenth, for placing numbers such as 0.37. Because hundredths are so close together, being one hundredth out still counts on this line.
Try an example: Put 2.4 on a 0 to 3 line in tenths.
Find 2, then count 4 tenths to the right.
Show the answer
Four small steps after 2
What to look out for
Thinking 0.5 is less than 0.37 because 5 is less than 37. Compare tenths first: 0.5 has 5 tenths, 0.37 has only 3.
Simplifying fractions
In the game, children balance the scales with equivalent fractions, such as 12/18 = ?/3 or 3/4 = 9/?. In the Quick quiz, each question shows a fraction to simplify, with four choices. Watch out: sometimes one of the wrong choices is equal in value but only partly simplified (such as 6/9 for 12/18). It is a fair fraction, but not the simplest form, so it is not the answer.
Try an example: Simplify 15/20.
Both are in the 5 times table: 15 ÷ 5 = 3, 20 ÷ 5 = 4.
Show the answer
3/4
What to look out for
Stopping too early: 24/36 simplified to 12/18. After each step, check whether the new numbers still share a factor.
Practice away from the screen
- Use a chocolate bar or pizza cut into equal pieces: 2 eighths eaten plus 3 eighths eaten is 5 eighths eaten.
- Use money: $0.37 is 37¢, and $1.70 is one dollar and seventy cents.
- Look at fractions in recipes or measurements: is 4/8 of a cup the same as ½?
Curriculum connections
Adding and subtracting fractions
Supports part of Common Core 4.NF.B.3.a. This focused game does not cover the entire standard.
Common Core connection: 4.NF.B.3.a. This is focused practice for part of the standard.
Decimals on a number line
Supplemental practice placing decimal numbers on a line. This supports decimal understanding but does not cover all of 4.NF.C.6.
Simplifying fractions
Supplemental equivalent-fraction practice. Common Core 4.NF.A.1 focuses on explaining equivalence with models; this game practices simplification numerically.
Questions families ask
Where should we start with fractions?
Start with Adding and subtracting fractions. Look at the worked example together, then try a round. If the task feels unfamiliar, use the full game guide or its free printable before trying again.
Does this cover everything taught at this level?
No. These games provide focused practice. Grade suggestions do not replace your school’s curriculum, and any Common Core connection applies only to the skill described.