Multiplication Methods

Introduction

At primary school, you likely learnt how to multiply using either the grid method or the column method or the lattice method.  In today's lesson, we will learn six different ones!  

In this lesson, you will be working in groups of 3's or 6's.  Assign each member a letter from A to F:

• Members A and D are to look at Methods 1 and 2;

• Members B and E are to look at Methods 3 and 4;

• Members C and F are to look at Methods 5 and 6.

For each of the methods, click on the respective worksheet below.  Read through the method and watch the video if there is one.

Practice

Now that you have learnt your assigned methods, explain to your group how to multiply the following questions using methods 2, 3, or 5:

1. 15 x 43

2. 37 x 21

3. 65 x 79

Once you have learnt how to multiply from your peers, practise multiplying  the following questions using methods 2, 3, or 5:

1. 37 x 45

2. 61 x 29

3. 183 x 57

4. 248 x 619

Further Practice 

Some essential skills introduced in this lesson are different methods of multiplication including column and grid methods.  You may also wish to practise division methods such as short division, long division and chunking.  Do the relevant skills practice on DrFrostMaths, CorbettMaths, MyiMaths and Eedi.  Watch any video and/or go through any online lesson as you see fit.

Transum

• Times Square - practise your times tables with this self-checking multiplication grid.

• Pairs 240 - find the pairs of numbers that multiply together to give a product of 240 in this collection of matching games.

• Three Ways - find three different ways of multiplying four different digits together to get the given target number. There are nine levels for this online challenge.

• Formal Written Methods - examples of formal written methods for addition, subtraction, multiplication and division.

• Number Skills Inventory - a checklist of basic numeracy techniques that every pupil should know.  Look especially at the adding and subtracting activities.

• Mix and Math - determine the nature of adding, subtracting and multiplying numbers with specific properties - not everything here is relevant.

• What Are They? - an online exercise about sums, products, differences, ratios, square and prime numbers - not everything here is relevant.

Negative numbers

• Boxed In Numbers - the classic dots and boxes game with the addition of some positive and negative numbers which determine your score.

• Negative Magic - four partially completed magic squares containing negative numbers. Fill in the missing numbers.

• Negative Numbers - use negative numbers in basic arithmetic and algebraic calculations and word problems.

• Reading Scales - a self marking exercise on the reading of scales of different types.

• Temperatures - test your understanding of negative numbers with this self marking quiz about temperatures.