Lesson 1.5: Multiplication & Division Methods | SEA Mathematics | My Carib Academy
SEA 2025-2028 Framework Aligned

✖️➗ Lesson 1.5: Multiplication & Division Methods

Master multiplication and division of 2-4 digit numbers with and without remainders. This lesson covers SEA Mathematics Objectives 21-22 from the Number Strand.

50 Minutes
Module 1: Number
Objectives 21-22
2 Videos
Lesson Progress 0%

Previous Lesson

Did you complete Lesson 1.4? Review Addition & Subtraction →

Learning Objectives

By the end of this lesson, you will be able to:

  • Multiply 2-4 digit numbers by 1-2 digit numbers (Objective 21)
  • Divide 2-4 digit numbers by 1 digit numbers with and without remainders (Objective 22)
  • Use column multiplication and long division methods
  • Solve one-step and multi-step word problems involving multiplication and division

SEA Tip

Multiplication and division questions appear in Section I, II, and III of the SEA Math paper. These are essential skills! (SEA Framework Page 21-22)

Watch: Multiplication Strategies

Start by watching this video to learn multiplication strategies for 2-4 digit numbers. Take notes as you watch! 📝

Multiplication Strategies – Mathematics Video Lesson

Quick Check

Did you understand the video? Review the notes below before continuing! ✅

Multiplication Strategies (2-4 Digit Numbers)

For the SEA exam, you need to multiply numbers up to 4 digits by 1-2 digit numbers. Column method is key!

📋 Column Multiplication Method:

Step-by-Step Guide
  1. Write the numbers in columns (align by place value)
  2. Start multiplying from the right (Ones column)
  3. If the product is 10 or more, carry over to the next column
  4. Continue multiplying each column (Tens, Hundreds, Thousands)
  5. Add all partial products to get the final answer

📊 Example 1: Multiplying 2-Digit by 1-Digit

456 × 7 = ?
Thousands Hundreds Tens Ones
4 5 6
× 7
3 1 9 2

Answer: 3,192

Working: 6×7=42 (write 2, carry 4), 5×7=35+4=39 (write 9, carry 3), 4×7=28+3=31

Common Mistake

Don’t forget to carry over when the product is 10 or more! Always add the carried number to the next column.

Watch: Division Strategies

Now watch this video to learn division strategies including remainders. Pay attention to the steps! 🎯

Division Strategies – Mathematics Video Lesson

Division Strategies (With & Without Remainders)

For the SEA exam, you need to divide 2-4 digit numbers by 1 digit numbers. Long division is essential!

📋 Long Division Method (DMBS):

Step-by-Step Guide
  1. Divide – How many times does the divisor go into this digit?
  2. Multiply – Multiply the divisor by your answer
  3. Bring down – Bring down the next digit
  4. Subtract – Subtract to find the remainder
  5. Repeat until all digits are used

📊 Example 2: Division Without Remainder

864 ÷ 4 = ?
Step Working Result
8 ÷ 4 4 goes into 8 two times 2
6 ÷ 4 4 goes into 6 one time (remainder 2) 1
24 ÷ 4 Bring down 4, 4 goes into 24 six times 6
Final Answer No remainder 216

Answer: 216

📊 Example 3: Division With Remainder

527 ÷ 5 = ?
Step Working Result
5 ÷ 5 5 goes into 5 one time 1
2 ÷ 5 5 goes into 2 zero times 0
27 ÷ 5 5 goes into 27 five times (remainder 2) 5 R2
Final Answer Remainder 2 105 R2

Answer: 105 Remainder 2

Common Mistake

Don’t forget to write the remainder if there is one! Always check if your answer makes sense by multiplying back.

Word Problems

SEA loves word problems! Here’s how to solve multiplication and division word problems.

📊 Example Word Problem:

Multi-Step Problem

Question: A box contains 24 pencils. How many pencils are in 15 boxes?

Solution:

  1. Pencils per box: 24
  2. Number of boxes: 15
  3. Total Pencils = 24 × 15
  4. 24 × 15 = 360

Answer: There are 360 pencils in 15 boxes.

Check Your Work

Divide the answer by one of the numbers: 360 ÷ 15 = 24 ✓ This confirms your answer is correct!

Quick Quiz

Test your understanding! Select an answer for each question. ✖️➗

6 Questions
12 Minutes
70% to Pass

1. What is 456 × 7?

2. What is 864 ÷ 4?

3. What is 527 ÷ 5?

4. A box contains 24 pencils. How many pencils in 15 boxes?

5. What does DMBS stand for in long division?

6. What is 123 × 4?

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Lesson Complete!

Great job finishing Lesson 1.5! You’re mastering multiplication and division for the SEA exam! 🎉

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