For Ontario parents · Grade 4
What Math Should a Grade 4 Student Know? An Ontario Parent’s Guide
Grade 4 is the quiet year. There is no EQAO test, the report card often still says “satisfactory,” and yet this is the year more math gaps begin than any other. The reason is simple: Grade 4 is when multiplication facts have to stop being worked out and start being known. Here is what the Ontario curriculum expects by the end of Grade 4, and how to tell if something slipped.
The five strands of Ontario math
The 2020 Ontario curriculum organizes math into five areas:
- Number — place value, fractions, decimals, and the four operations. This is the big one.
- Algebra — patterns, simple equations, and an introduction to coding.
- Data — collecting, graphing, and interpreting data, plus basic probability.
- Spatial Sense — geometry (angles, shapes) and measurement (area, length, volume).
- Financial Literacy — money, simple budgeting, and value.
They matter, but they are not equally load-bearing. The Number strand is the one almost everything else rests on — and in Grade 4 the Number strand is doing two jobs at once: locking in multiplication and division facts, and turning fractions from a picture into a number.
The Grade 4 number milestones that matter most
By the end of Grade 4, a child is generally expected to:
Read and work with numbers to 10,000
Handle place value past a thousand, including the awkward cases where a zero sits in the middle of a number.
Add and subtract to 10,000, and with decimal tenths
Line numbers up correctly, regroup across zeros, and keep the decimal point aligned when tenths appear.
Recall multiplication and division facts to 10×10
Recall, not recalculate. This is the single most load-bearing expectation in Grade 4, and the one most often left half-finished.
Understand what the top and bottom numbers of a fraction mean
Know that the denominator says how many equal parts the whole is cut into and the numerator says how many are counted — and that the parts must be equal.
Count by fractions, including past one whole
Carry on past 4/4 into 5/4 and beyond, and place fractions greater than one on a number line.
Compare fractions by their actual value
Know that one third is bigger than one eighth, and be able to say why — without comparing the top and bottom numbers separately.
Red flags your child might have a gap
A report card rarely tells you where things slipped. These specific everyday mistakes are far more useful, because each one points at a different missing idea:
- Skip-counts from the beginning every single time instead of recalling a fact. Knowing 6 × 7 by counting up takes ten seconds; knowing it takes one.
- Knows a multiplication fact but not the matching division fact — can do 6 × 7 but stalls on 42 ÷ 7.
- Mixes up neighbouring facts, giving 6 × 7 as 36 or 48.
- Thinks 1/8 is bigger than 1/3 because eight is bigger than three. This is the most common fraction error in Ontario elementary math.
- Swaps the numerator and denominator when writing a fraction.
- Counts the unshaded parts of a diagram instead of the shaded ones.
- Gets stuck counting fractions at 4/4 and cannot carry on past one whole.
- Reads 4,080 as 480, or writes “four thousand sixty” as 4600.
- Misaligns numbers of different lengths when adding, or adds decimal tenths without lining up the point.
The fact-recall ones matter most. A child who can get the right answer slowly is marked correct on a Grade 4 worksheet, which is exactly why this gap survives into Grade 5 unnoticed.
Why Grade 4 gaps hide the longest
One real chain from the Ontario curriculum:
- Grade 2 — Equal groups and repeated addition
- Grade 3 — Multiplying and dividing with arrays
- Grade 4 — Recalling multiplication and division facts
- Grade 5 — Equivalent, improper, and mixed fractions
Look at the last step. Grade 5 fraction work depends directly on Grade 4 fact recall, because finding equivalent fractions is multiplying and dividing. A child who is still skip-counting their times tables does not have a fractions problem in Grade 5 — they have a Grade 4 fluency problem that shows up as a fractions problem. Drilling fractions will not touch it.
See exactly where your child stands — free
Groundwork’s free 5-minute diagnostic walks backwards through the Ontario curriculum to find the precise concept where your child got stuck — whether it’s a Grade 4 skill or a foundation from years earlier. No credit card.
Find the gap — free →If your Grade 4 child is getting right answers slowly, that is worth a closer look before next year. Grade 5 assumes the facts are automatic, and it spends that assumption immediately on fractions.
Common questions
Is there an EQAO test in Grade 4?
No. In elementary school, EQAO assessments are written in Grade 3 and Grade 6. That gap is part of why Grade 4 difficulties often go unflagged for a full year.
How fluent should a Grade 4 be with times tables?
The Ontario expectation is recall of multiplication and division facts up to 10 by 10. In practice that means answering without visible strategy work — not skip-counting, not drawing groups, not starting over from a known fact each time.
My child understands fractions in pictures but not in numbers. Is that normal?
Very. Grade 4 is exactly where that transition is supposed to happen, and it is a common place to stall. The usual missing piece is understanding that a fraction is a single number with a position on the number line, not two numbers stacked up.
Why is my Grade 4 child struggling with math?
Most often it is one of two things: multiplication and division facts that were never made automatic in Grade 3, or fractions being treated as two separate numbers. Both are specific and fixable, and both are much easier to address now than after Grade 5 builds on them.