Double Digits: Multiplication and Division Magic!

• newEditor
• Mathematics
• Primary Education

Double Digits: Multiplication and Division Magic!

What do you already know about dividing or multiplying bigger numbers using columns?

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Learning Objective

At the end of the lesson you will solve multiplication and division with 2-digit numbers using the column method.

What Is the Column Method?

The column method helps us set out big maths problems in a simple way by lining up numbers neatly.

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Multiplying by a 2-Digit Number

We use two steps: multiply the top number by each digit in the bottom number and write down each answer in the right place.

Step-by-Step Multiplication Example

Let's multiply 14 by 12. We start by multiplying 14 by 2, then 14 by 1 (which is really 10!), and add the answers.

Try It! Multiply With Columns

Can you work out 23 × 15 using the column method? Write your answer in the boxes!

Dividing by a 2-Digit Number

We use the column method for division by sharing and grouping, putting each answer above the line.

Step-by-Step Division Example

If we divide 96 by 12, we see how many twelves fit into 96. We use the columns to help us see each step.

Try It! Division Challenge

Can you work out 84 ÷ 12 using the column method? Draw your own columns and share your solution!

Top Tips for Column Calculations

Dividing

Think about how many times your divisor fits and check your work at the end!

Multiplying

Remember to line up your numbers carefully. Start with the unit digits!

Well Done: You Are a Column Star!

Now you can multiply and divide 2-digit numbers using columns. Can you teach someone else what you know?

Write down 3 things you learned in this lesson.

Write down 2 things you want to know more about.

Ask 1 question about something you haven't quite understood yet.