Grade 3 Math practice

25 Grade 3 math lessons, including add three-digit numbers, subtract three-digit numbers, rounding, order numbers to 1000, multiplication facts, multiples sort and more. Each one has a short video where Pip explains the idea, a worked example, and endless new practice questions with step-by-step help when a child gets stuck.

Step 1: Add three-digit numbers

Add hundreds, tens and ones separately, then put them together.

Example: 116 + 263

Tip: Break each number into hundreds, tens and ones.

Step 2: Subtract three-digit numbers

Take away the hundreds, then the tens, then the ones.

Example: 345 − 211

Tip: Break the number you are taking away into hundreds, tens and ones.

Step 3: Rounding

Rounding finds the nearest friendly number. Look at the digit to the right to decide.

Example: Round to the nearest 10 89

Tip: 5 or more, raise the score. 4 or less, let it rest.

Step 4: Order numbers to 1000

Compare hundreds first, then tens, then ones.

Example: Put the numbers in order, smallest first.

Tip: Line up the digits to compare.

Step 5: Multiplication facts

Multiplying is a fast way to add equal groups. 3 × 4 means 3 groups of 4.

Example: 4 × 10

Tip: Stuck on a big fact? Break it apart: 7 × 8 = 7 × 5 + 7 × 3.

Step 6: Multiples sort

Multiples of 3 are the numbers you say when you count by 3s.

Example: Is each number a multiple of 4?

Tip: Count by the number and see if you land on it.

Step 7: Make an array

An array is rows with the same number in each row.

Example: Shade 4 rows of 3 squares.

Tip: Shade one row at a time.

Step 8: Match times facts

Each times fact has one product.

Example: Match each fact to its product.

Tip: Use skip counting if you forget a fact.

Step 9: Multiply by tens

To multiply by 10s or 100s, hide the zeros, multiply, then bring the zeros back.

Example: 4 × 30

Tip: 4 × 30 is the same as 4 × 3 tens, which is 12 tens = 120.

Step 10: Build the product

Multiplication finds the total of equal groups.

Example: Build the answer to 5 × 3.

Tip: Use a times fact you know to help.

Step 11: Division facts

Dividing means sharing into equal groups. Every division has a times fact hiding inside.

Example: 42 ÷ 6

Tip: For 24 ÷ 6, ask: 6 times what makes 24?

Step 12: True or false: dividing

Division shares into equal groups.

Example: Is this true or false? 16 ÷ 2 = 7

Tip: Check with multiplication: 12 ÷ 3 = 4 because 4 × 3 = 12.

Step 13: Missing factors

If you know the answer and one factor, division finds the missing one.

Example: ? × 5 = 20

Tip: ? × 6 = 42 is the same question as 42 ÷ 6.

Step 14: Many ways to multiply

The same product can come from different facts: 2 × 6 and 3 × 4 both make 12.

Example: Choose every fact that makes 12.

Tip: Check each fact one at a time.

Step 15: Story problems: groups and sharing

Equal groups mean multiply. Sharing equally means divide.

Example: Amara has 6 bags with 3 stickers in each bag. How many stickers are there altogether?

Tip: "Each" and "every" are clues that the groups are equal.

Step 16: Fraction of a group

To find 1/3 of 12, share 12 into 3 equal groups. One group is 1/3.

Example: 1/6 of 36 = ?

Tip: The bottom number tells how many equal groups to make.

Step 17: Fractions on a number line

A number line from 0 to 1 can be cut into equal parts. Each jump is one of those parts.

Example: What fraction is the dot at? 0 1 ? /8

Tip: The bottom number is how many parts. The top number is how many jumps from 0.

Step 18: Fractions on a number line

The space from 0 to 1 can be cut into equal parts. 3/4 is 3 parts out of 4.

Example: Tap 2/3 on the number line.

Tip: Count the jumps from 0.

Step 19: Perimeter of rectangles

Perimeter is the distance all the way around a shape.

Example: What is the perimeter in cm? 12 cm 8 cm

Tip: For a rectangle, add one long side and one short side, then double it.

Step 20: Area of rectangles

Area is how many squares it takes to cover a shape.

Example: What is the area in square units? 5 units 6 units

Tip: Rows times squares in each row. That is length times width.

Step 21: Choose the unit

Small things use small units (g, mL, cm). Big things use big units (kg, L, m, km).

Example: Which unit would you use for the mass of a dog?

Tip: Mass: g or kg. Liquid: mL or L. Length: cm, m or km.

Step 22: Elapsed time

Elapsed time is how much time passes between a start and an end.

Example: A bus ride starts at 2:35 and ends at 2:40. How many minutes long is it?

Tip: When both times are in the same hour, just subtract the minutes.

Step 23: Earliest to latest

a.m. times are before noon. p.m. times are after noon.

Example: Put these times in order, earliest first.

Tip: Put all the a.m. times first.

Step 24: Make change

Change is the money you get back. Count up from the price to what you paid.

Example: Ana buys a snack for $4.65 and pays with a $5 bill. How much change? (in dollars)

Tip: First count up to the next whole dollar, then count the dollars.

Step 25: How much change?

Change is what you get back when you pay more than the price.

Example: Something costs $8.75. You pay with a $10 bill. How much change? (like $1.25)

Tip: Count up from the price to what you paid.

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