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  6. CH 4|Teacher Resource Sheets

Student Resource Book  |  
Year 5 (3A)

Number & Algebra

Chapter 4  |  Multiplication Strategies

Teacher Resource Sheets

Multiplying using facts already known

This displays the instructions for this game.

This displays the Getting started on page 94.

This displays an example using an array to work out 8 x 6 using 8 x 5, and then some multiplications which are close to fives or tens facts. Students are asked to break them up into tables they know.

 

This displays the materials (blocks) for finding 4 x 7 from 2 x 7.

and 8 x 9 from 2 x 9.

 

Students are then asked to use materials to show two more.


Multiplying tens

Give students some play money.

 

This displays a story for the multiplication 5 x 40.

 

The working is shown using play money.

This displays a table with multiplication of numbers such as 4 x 20, 5 x 60, 40 x 60, 200 x 40 etc.

Ask students to predict the number of digits that will be in the answer.

 

You could fill in the table by copying it onto the board, using it with a smart board or pdf writer, or projecting it onto a surface you can write on.

 

Once the table is filled in ask students to look for a pattern/rule.

 

Ask students why, for example, 2 x 300 and 8 x 500 look similar but give answers with different numbers of digits.


Multiplying by choosing a strategy

This displays a sheet with four multiplications.

 

Ask students which strategies are best to use with each one and why.

 

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