What Ontario grade 4 students learn in mathematics

Your child will be able to read, write, and take apart (decompose) and put together (compose) whole numbers up to 10,000. They will also understand how these numbers are used in everyday life.

Your child will be able to compare and put in order whole numbers up to 10,000, understanding which numbers are bigger or smaller in different situations.

Your child will be able to estimate numbers by "rounding" them up or down to the closest ten, hundred, or thousand, depending on the situation. For example, they'll learn that 23 rounded to the nearest ten is 20.

Your child will be able to show fractions like one-half or three-quarters using pictures, tools, or by writing them down (e.g., 1/2). They will also understand what the top number (numerator) and bottom number (denominator) in a fraction mean.

Your child will be able to use pictures or objects to show fractions. They will compare and put in order fractions that come from sharing things fairly among a certain number of people, like sharing a pizza between 3 or 5 friends.

Your child will be able to count to 10 using fractions like halves, thirds, or fourths, and can do this with or without help from tools.

Your child will be able to read, write, and compare decimal numbers that have one digit after the decimal point (like 0.5), and put them in the correct order, using different examples.

Your child will be able to round decimal numbers (numbers with parts of a whole, like 3.5) to the nearest whole number (like 3 or 4) in different situations.

Your child will be able to understand how fractions and decimals (like 0.1, 0.2, etc.) are related and can represent the same amount in different situations.

Your child will be able to solve math problems using addition, subtraction, multiplication, and division, even when a problem needs more than one step, and will be able to check their answers.

Your child will be able to quickly remember multiplication facts up to 10 x 10, and also understand the related division facts (for example, knowing that if 3 x 4 = 12, then 12 ÷ 4 = 3).

Your child will be able to solve multiplication and division problems with numbers like 10, 100, and 1000 in their head, and also add and subtract decimal numbers that have one digit after the decimal point. They will also be able to explain how they figured out the answers.

Your child will be able to solve addition and subtraction problems with whole numbers up to 10,000, and with decimal numbers that have one digit after the decimal point (like 3.5). They will use different methods, including step-by-step procedures called algorithms, to find the answers.

Your child will be able to solve problems that involve multiplying two- or three-digit numbers by one-digit numbers, or by 10, 100, or 1000, sometimes using tools like arrays (which are pictures that show rows and columns of objects).

Your child will be able to solve division problems with two- or three-digit numbers divided by one-digit numbers. They will also understand how to write any leftover amount (remainder) as a fraction, and use tools like arrays (pictures that show equal rows and columns) to help them.

Your child will learn that repeatedly adding the same fraction, like 1/4 + 1/4 + 1/4, is the same as multiplying that fraction by a whole number, such as 3 x 1/4. They will use objects, pictures, and written fractions to show this connection.

Your child will be able to understand and show simple multiplication relationships using whole numbers, like figuring out how many apples are in 3 bags if each bag has 2 apples. They will use different tools and drawings to help them.

Your child will be able to find and explain different kinds of patterns, like ones that repeat over and over or ones that grow bigger, including patterns they see in everyday life.

Your child will be able to make and change patterns that repeat or grow, using different ways to show them like charts and graphs.

Your child will be able to figure out the rules that patterns follow and use those rules to continue the patterns, guess what comes next, and find missing parts in patterns that repeat or grow.

Your child will be able to make and explain patterns that show how whole numbers and numbers with one decimal place (like 2.5 or 3.1) are connected.

Your child will learn that symbols like letters can stand for unknown numbers (these are called "variables") in math problems. They will use these symbols in mathematical phrases (expressions) and number sentences that show two things are equal (equations).

Your child will be able to solve math problems with numbers up to 50, and check their answers to make sure they are correct.

Your child will be able to solve math problems that use inequalities (like "greater than" or "less than") with numbers up to 20, and then show their answers on a number line.

Your child will be able to solve math problems and show their work using computer code. This includes writing and running code that follows steps one after another, happens at the same time, repeats, or has events happening within other events.

Your child will be able to read and change existing computer code, including code that makes things happen one after another, at the same time, over and over, or inside other events. They will also understand how changing the code affects what the program does.

Your child will be able to tell the difference between two types of information: "qualitative data" which describes qualities (like colours or feelings), and "quantitative data" which deals with numbers and amounts. They will also understand when it's best to use each type of information.

Your child will be able to gather information from different places, like surveys they conduct themselves (primary sources) or information that's already been collected (secondary sources). They'll use this information to answer questions by comparing different sets of data, and then organize it into tables that show how often something occurs (frequency tables) or plots that display data by separating each value into a "stem" and a "leaf" (stem-and-leaf plots).

Your child will learn to choose the best type of graph (like a bar graph with multiple bars) to show different information. They will also be able to create these graphs correctly with titles, labels, and proper numbering, and explain why they chose that specific graph.

Your child will be able to create an infographic (a visual way to show information) using a set of data. They will use different ways to show this data, like charts and graphs, and add other details to help explain what the data means.

Your child will be able to find the average (mean), the middle number in a list (median), and the number that appears most often (mode) in a set of whole numbers. They will also understand what each of these numbers tells us about the data.

Your child will be able to look at different kinds of information, like charts that show how often things happen (stem-and-leaf plots) or graphs that compare several things at once (multiple-bar graphs). They'll ask questions about this information, figure out what it means, and then use that understanding to make good arguments and smart choices.

Your child will be able to use words like "impossible" or "certain" to talk about how likely something is to happen, like if it will rain tomorrow. They will also be able to show this likelihood on a number line and use it to help them make smart choices.

Your child will be able to guess and check if the average (mean), middle number (median), and most frequent number (mode) in a set of information will be the same when comparing different groups of people or things.

Your child will be able to identify the properties of rectangles, such as how many right angles (like the corners of a square) they have, which sides are parallel (run in the same direction without ever meeting) or perpendicular (meet at a right angle), and where the lines of symmetry (lines that divide the shape into two identical halves) are.

Your child will learn to find and mark points on a graph using coordinates (like an address for a spot on a map) and understand how to describe moving a point from one place to another on that graph.

Your child will be able to move shapes on a grid, either by sliding them (translation) or flipping them (reflection), and predict where the shape will end up.

Your child will understand how grams and kilograms are used to measure how heavy things are (mass), and how litres and millilitres are used to measure how much liquid something holds (capacity). They will also be able to use common objects as references to estimate these measurements.

Your child will learn to use metric prefixes like "kilo" (for kilometer) or "centi" (for centimeter) to understand how different metric units relate to each other in size. They will also learn to pick the right tools and units to measure length, weight, and how much something can hold.

Your child will be able to solve problems that involve figuring out how much time has passed, like how long a trip takes, by understanding how different units of time (minutes, hours, days) relate to each other.

Your child will be able to recognize different types of angles, like a right angle (which looks like the corner of a square), a straight angle (a flat line), an acute angle (smaller than a right angle), and an obtuse angle (larger than a right angle but not a straight line).

Your child will understand how to use rows and columns (like in a grid) to figure out the area of a rectangle and learn that you can find the area by multiplying its length by its width.

Your child will be able to figure out a missing side length of a rectangle if they know its total area and the length of the other side.

Your child will learn about different ways to pay for things they want or need, like using cash or a debit card.

Your child will be able to quickly figure out the total cost of a few items that are priced in whole dollars, and how much change they should get back when paying with cash, without using a calculator.

Your child will learn about different ways people use money, like spending it, putting it away for later (saving), getting it from work (earning), using it to make more money (investing), and giving it to others (donating). They will also understand what to think about when making simple choices about each of these.

Your child will learn how spending money and saving money are connected, and understand that different people make different choices about spending and saving.

Your child will learn how to figure out if something is a good deal and worth buying.