Grade 4 · Year 5 · Class 4 · ages 9–10 · Decimals
Adding and subtracting decimals: Grade 4 practice
Adding and subtracting decimals with tenths and hundredths. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
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Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
Line up the decimal points so tenths sit under tenths and hundredths under hundredths.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy 19.7 + 16.4 =
Answer: 36.1
Medium 48.54 + 3.92 =
Answer: 52.46
Challenge 38.9 + 87.95 =
Answer: 126.85
More ways to practise adding and subtracting decimals
- Printable adding and subtracting decimals worksheet with an answer key (new questions every time)
- All Grade 4 practice · Decimals worksheets
Related skills
- Fractions as decimals (Grade 4)
- Money with decimals word problems (Grade 4)
- Multiplying decimals (Grade 5)
- Decimals as fractions (Grade 5)
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FAQ
Adding and subtracting decimals: questions
What grade is adding and subtracting decimals?
It is usually taught in Grade 4 (Year 5 in England, Class 4 in India, ages 9–10), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a adding and subtracting decimals question look like?
For example: "48.54 + 3.92 =" The answer is 52.46. Line up the decimal points so tenths sit under tenths and hundredths under hundredths.
What should I learn before and after adding and subtracting decimals?
It is a good place to start in this topic. After it, move on to fractions as decimals (Grade 4).
How can I get better at adding and subtracting decimals?
Line up the decimal points so tenths sit under tenths and hundredths under hundredths. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
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