Math · 4th Grade (9-10)
Math exercises for 4th Grade (ages 9-10)
In 4th Grade (ages 9-10), kids strengthen number sense, place value, addition, subtraction, multiplication, fractions, geometry and measurement. The exercises below are curriculum-aligned so you can pick what to practise next.
181 exercises in this hub
What 4th Grade covers
Fourth grade is where decimals arrive and the numbers get genuinely large. Children read and write numbers up to a million, multiply four-digit numbers by one digit, use short division, and start rounding to check whether an answer is plausible. Tenths and hundredths connect fractions to decimals, and equivalent fractions get generated systematically rather than spotted. Measurement moves to formulas for the area and perimeter of rectangles and to converting between metric units. Geometry introduces coordinates in the first quadrant and classifying triangles by their sides and angles, while data work extends to line graphs showing change over time.
Modules in this year
Where children usually get stuck
Decimal place value
0.5 and 0.05 look similar and sound similar, and the rule "more digits means bigger" that worked for whole numbers now actively misleads. Place-value charts that extend to the right of the decimal point are worth more than repeated correction.
Losing place in short division
Short division is unforgiving about layout: one misaligned digit and the answer is out by a factor of ten. Squared paper and insisting on one digit per box removes most of these errors without any extra teaching.
Area and perimeter used interchangeably
Both are "about" a rectangle and both involve its sides, so the two get swapped constantly. Tying each to a concrete question — how much fence, how much carpet — makes the distinction stick better than the formulas do.
How to practise at home
- 1
Ten minutes, most days
Short and frequent beats long and occasional, especially for number facts. Ten focused minutes after school, four or five days a week, will do more for a 4th Grade child's fluency than an hour at the weekend — and it is far easier to keep going.
- 2
Ask for the method, not the answer
"How did you work that out?" is the single most useful question you can ask, and it is worth asking when the answer is right as well as when it is wrong. It shows you whether a correct answer came from understanding or from a lucky guess.
- 3
Use the kitchen and the shop
Doubling a recipe, working out change, reading a scale, timing something — these are the same skills the worksheets cover, with the advantage that they obviously matter. A child who resists a page of sums will often happily work out whether there is enough money.
Prefer it on paper?
Open a free printable worksheet for 4th Grade, with a full answer key and no account needed.
Featured exercises
Plotting Points on a Coordinate Grid (Ex. 2)
Level 38 minOrdering and Comparing Numbers to 10,000 (Ex. 1)
Level 38 minCompleting Symmetric Shapes (Ex. 2)
Level 38 minLong Multiplication
Level 38 minDivide 3-Digit Numbers with Remainders (Ex. 1)
Level 310 minColumn Addition with Regrouping (Ex. 1)
Level 310 minArea and Perimeter
Level 38 min12- and 24-Hour Clocks (Ex. 1)
Level 38 minConvert km and m (Ex. 3)
Level 38 minEstimating with Rounding (Ex. 2)
Level 38 minClassifying Quadrilaterals (Ex. 2)
Level 38 minPartitioning 4-Digit Numbers (Ex. 3)
Level 38 minConvert km and m (Ex. 1)
Level 38 minClassifying Quadrilaterals (Ex. 1)
Level 38 minReading Numbers to 10,000 (Ex. 1)
Level 38 minArea Using Formulas (Ex. 2)
Level 38 minGenerating Equivalent Fractions (Ex. 2)
Level 38 minLong Division
Level 38 minDivision Facts to 12×12 (Ex. 2)
Level 38 minDivide 3-Digit Numbers with Remainders (Ex. 2)
Level 310 min
Common questions
- What maths should a 4th Grade child know?
- The modules listed on this page are the standard objectives for 4th Grade (9-10) — they are what most primary curricula expect a child to cover during the year. Children move through them at genuinely different speeds, so treat the list as the shape of the year rather than a checklist with a deadline.
- How much practice is enough?
- For most children at this age, ten to fifteen minutes on most days is plenty. Regularity matters much more than volume: short sessions keep number facts fresh and keep maths from becoming something that only happens when there is a problem.
- Are these exercises free?
- You can browse every module on this page and open a free printable worksheet with an answer key without creating an account. A free account adds the full exercise library, progress tracking, and the ability to assign specific practice to your kids.
- Do these follow the school curriculum?
- The exercises are mapped to standard primary objectives for each year and grouped into the modules shown above. They are written to sit alongside most national curricula rather than to follow one country's exact sequence, so the topics will match even where the ordering differs.