EQAO Grade 6 Math: Top 10 Topics Students Get Wrong (and How to Fix Each One)
Every year, thousands of Ontario Grade 6 students lose marks on the same ten mathematical topics in EQAO. The good news: these mistakes are completely predictable — and completely fixable. This guide identifies exactly where students go wrong, shows the difference between a wrong approach and the right one, and links to free targeted practice for each topic.
📋 The 10 Most Missed Grade 6 EQAO Math Topics
- Converting between fractions, decimals, and percentages
- Ratios and proportional reasoning
- Algebraic expressions — substituting values
- Area and perimeter of composite shapes
- Reading and interpreting graphs
- Integers and negative numbers
- Probability language and fractions
- Angle properties and measurement
- Financial literacy — interest and budgeting
- Open-response questions — showing reasoning
📌 Before You Read
These 10 topics come from analysis of EQAO released items and common error patterns in Grade 6 Ontario mathematics. If your child is preparing for EQAO Grade 6, use this as a diagnostic checklist — work through each topic and identify which ones need the most attention.
Converting Between Fractions, Decimals, and Percentages
This is the single most commonly missed topic on the Grade 6 EQAO math assessment. Students often know how to work with fractions, decimals, and percentages separately — but freeze when asked to convert between them.
Why students get it wrong: They learn the three forms in isolation and never practise converting fluidly between all three in a single question.
The Fix: Practise the conversion chain daily: fraction → decimal → percentage, and backwards. Use a conversion table for the most common fractions (1/2, 1/4, 3/4, 1/5, 2/5, 1/10) until they are automatic.
📐 Practice Fractions & Decimals →Ratios and Proportional Reasoning
Ratio questions on EQAO Grade 6 are often presented as real-world word problems — recipes, maps, scale drawings, and mixing problems. Students who can solve abstract ratio equations frequently fail the contextual versions.
Why students get it wrong: They don't identify which quantities the ratio refers to, and they confuse ratios with fractions.
The Fix: Always draw a ratio bar diagram before calculating. Label parts clearly. Practise identifying "part to part" vs "part to whole" ratios — EQAO uses both.
📐 Practice Ratios →Algebraic Expressions — Substituting Values
Grade 6 EQAO includes algebraic questions where students must substitute a value into an expression and evaluate it. These are marks many students give away unnecessarily.
Why students get it wrong: They forget order of operations when substituting, especially with multiplication adjacent to brackets.
The Fix: When substituting, always write the number inside brackets immediately after replacing the variable. This prevents order-of-operations errors. Practise 10 substitution problems daily for one week.
📐 Practice Algebra →Area and Perimeter of Composite Shapes
EQAO Grade 6 frequently tests composite shapes — irregular shapes made by combining or subtracting simpler shapes. This requires students to decompose the shape before calculating, a step many skip.
Why students get it wrong: They try to use a single formula on the whole shape, or they add area and perimeter together when only one is asked for.
The Fix: For every shape question, write two things before calculating: (1) "I am finding: Area OR Perimeter" and (2) "My units will be: cm² OR cm". This simple habit prevents the most common errors.
📐 Practice Area & Perimeter →Reading and Interpreting Graphs
EQAO Grade 6 data questions go beyond simply reading a value from a graph. They ask students to interpret trends, calculate differences, and make inferences from data — skills many students haven't practised explicitly.
Why students get it wrong: They read the wrong axis, misread the scale, or answer what the graph shows rather than what the question actually asks.
The Fix: Before reading any value from a graph, spend 15 seconds checking the axis labels and scale. Underline the question word — "difference", "total", "increase" — to know exactly what calculation is needed.
📐 Practice Data & Graphs →Integers and Negative Numbers
Integers appear in Grade 6 EQAO in temperature comparisons, number lines, and basic operations. Students frequently make sign errors that cost them straightforward marks.
Why students get it wrong: They confuse subtracting a negative number with adding, or they order negative numbers incorrectly (thinking -8 is greater than -2 because 8 is greater than 2).
The Fix: Draw a number line for every integers question. Plot the numbers visually before ordering or comparing them. This eliminates almost all integer ordering errors instantly.
📐 Practice Integers →Probability Language and Fractions
Probability is one of the most predictable EQAO Grade 6 topics — the same types of questions appear every year. Yet many students lose marks here because they haven't learned the specific language EQAO uses.
Why students get it wrong: They don't express probability as a fraction, or they confuse the number of favourable outcomes with the total number of outcomes.
The Fix: Learn the probability formula: P(event) = favourable ÷ total. Always count the total outcomes first. Practise expressing the same probability as a fraction, decimal, and percentage.
📐 Practice Probability →Angle Properties and Measurement
Grade 6 EQAO tests key angle properties: angles in a triangle sum to 180°, angles on a straight line sum to 180°, and angles in a quadrilateral sum to 360°. Students lose marks by not knowing which rule applies.
Why students get it wrong: They apply the triangle rule to quadrilateral problems, or they try to measure the angle visually rather than calculating.
The Fix: Create a simple reference card with three angle rules and review it daily for one week. When an angle question appears, identify the shape first before applying any formula.
📐 Practice Angles →Financial Literacy — Interest and Budgeting
Financial literacy was added to the Ontario Math curriculum in 2020 and now appears regularly on EQAO Grade 6. Many students haven't had enough practice with these real-world money contexts.
Why students get it wrong: They confuse the interest amount with the total repayment amount, or they misread percentage problems involving discounts and tax.
The Fix: Practise reading financial word problems twice. Underline the question being asked — "interest earned", "total after discount", "final cost with tax" — before calculating. Each phrase requires a different calculation.
📐 Practice Financial Literacy →Open-Response Questions — Showing Reasoning
Open-response questions are worth the most marks on the EQAO Grade 6 math assessment — and they are the questions students prepare for the least. A correct numerical answer without explanation often receives partial credit only.
Why students get it wrong: They write only the final answer and don't show the steps that led to it. EQAO markers award marks for the process, not just the result.
The Fix: For every open-response practice question, use this three-part structure: (1) State your method in one sentence. (2) Show all calculations with labels. (3) Write a final answer sentence: "Therefore, the area is 48 cm²." Practise this structure until it is automatic.
📐 Practice Open-Response →Your Action Plan: Fix These 10 Topics Before EQAO
✅ Recommended 4-Week Fix Plan
- Week 1: Fractions/decimals/percentages + Ratios (topics 1 and 2 — highest frequency)
- Week 2: Algebra + Area/Perimeter + Data (topics 3, 4, 5)
- Week 3: Integers + Probability + Angles (topics 6, 7, 8)
- Week 4: Financial literacy + Open-response practice (topics 9 and 10) + one full Grade 6 mock exam
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