Multiplication/Division

Workbook by

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Multiplication strategies

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We are learning about and revisiting:

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-10’s, 100’s & 1000’s

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-groups / Array / repeated addition

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-skip counting

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-splitting and recombining

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-rounding and compensating

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-solve multiplication problems.

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Instructions:

Write your answers in the geens boxes like this one: . .

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Please use the faces on each slide to show how well you understood the work, by colouring or highlighting the box.

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Note:

If you see this fellow, STOP and check with your teacher before you continuing to the next slide.

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Multiplication can also be done by repeated addition

Here a 3 groups of 10 fingers

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10 + 10 + 10 = 30

So: 3 groups of 10 = 30 (this is called repeated addition)

It is easier to write: 3 x 10 = 30

Your Turn: do these repeated addition problems

Here a 5 groups of 5 teachers: (delete the ? and put missing number)

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5 + 5 + . . + . . + . . =

So 5 x 10 = ?

Here are groups of 5 cats:

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5 + ? = So 2 x 5 =

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Multiplication is about adding groups together quickly

You can also skip count in 10s:

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10 20 30 40 so x 10 = 40

Because when we skip count in 10’s we are just adding ten on each time.

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Write how many pairs of feet in total here.

Your turn: count in 5s and10s to answer these questions:

How many apples? (type the number that should be where the . . are)

5 . . 15 20 . . 30 So 6 x 5 = . .

How many bananas are there?

10 . . 30 . . So . . x 10 = . .

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2x tables

2x tables

How well do you know your 2x tables multiplication facts?

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Multiply the numbers by the centre number.

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Click the box and a text box will come up

2x tables

How well do you know your 2x tables multiplication and division facts?

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Using the line tool, draw a line between the question and answer.

2x tables

Can you help Detective Dog track down the missing numbers from the 2x table?

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2x tables

How well do you know your 2x tables multiplication facts?

Test yourself using Snappy maths OR times tables.co nz, and take a screenshot of your results and add it here: ↧

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Test yourself 2x tables on Snappymaths

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OR

How did you go? Take a screenshot of your final score and add it to this slide.

5x tables

A 5x song to sing and dance to (at home?)

5x tables

How well do you know your 5x tables multiplication and division facts?

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Multiply the numbers by the centre number.

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Click the box and a text box will come up

5x tables

Can you help Detective Dog track down the missing numbers from the 5x table?

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5x tables

How well do you know your 5x tables multiplication facts?

Test yourself using Snappy maths OR times tables.co nz, and take a screenshot of your results and add it here: ↧

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Test yourself 5x tables on Snappymaths

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OR

How did you go? Take a screenshot of your final score and add it to this slide.

Let’s Look at Arrays

Arrays are an organised way of grouping things so it is easy to count them or add them up, like this:

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4 rows of 6 eggs = 24

So,

4 x 6 = 24

2 rows of 5 = 10

So, 2 x 5 = 10

Your turn #1: Count how many rows in the arrays, then finish the number sentences.

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. .rows of 9 = 63

So, . . x 6 = . .

. rows of 6 = 18

So, 3 x . = . .

Your turn #2: write the equation for these arrays

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. . rows of 3 = . 9 .

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So, . . x . . = . .

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4 rows of . . = 12 .

So, . . x . 3 . = . .

10x tables

10x tables

How well do you know your 10x tables multiplication facts?

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Multiply the numbers by the centre number.

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Click the box and a text box will come up

10x tables

Can you help Detective Dog track down the missing numbers from the 10x table?

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10x tables

How well do you know your 10x tables multiplication facts?

Test yourself using Snappy maths OR times tables.co nz, and take a screenshot of your results and add it here: ↧

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Test yourself 10x tables on Snappymaths

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OR

How did you go? Take a screenshot of your final score and add it to this slide.

2, 5, and 10x tables

practise

A game for you to practise your times tables. Play it once with a group partner.

It is in the Multiplication games box.

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LO: To use basic facts to solve multiplication WORD problems.

Example:Libby gives 4 friends 5 sweets. How many sweets will she need altogether? 4 x 5 = 20

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1. 3 children need 5 coloured felts each. How many felts do they need altogether?

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• There are ten 5-a side football teams in a tournament. How many children are in the competition?

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• For a treat a Grandma is buying her 2 grandchildren some lollies. She wants to give them 7 each. How many should she buy?

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• Cooper is collecting pokemon cards. They come in packs of five. How many packs does he need to get 30 cards?

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• Ms Lange planted 5 strawberry bushes each pot in the garden. There are 6 pots for strawberries. How many strawberry plants were there altogether?

Read each of the questions carefully. Do your working your maths book. Hand your book to the

teacher at the end of the session so she can mark it :)

LO: To use the partition method to solve multiplication problems. TU x U =

Watch the video to remind yourself how to use partitioning to solve a 2 digit number by a 1 digit number

LO: To use the partition method to solve multiplication problems. TU x U =

(This is also called the splitting and Recombining method)

3 x 39 =

LO: To use the partition method to solve multiplication problems. TU x U =

5 x 13 =

YOUR

TURN!

LO: To use the partition method to solve multiplication problems. TU x U =

5 x 62 =

YOUR

TURN!

LO: To use the partition method to solve multiplication problems. TU x U =

52 x 2 =

YOUR

TURN!

LO: To use the partition method to solve multiplication problems. TU x U =

2 x 37 =

YOUR

TURN!

LO: To use the partition method to solve multiplication problems. TU x U =

5 x 72 =

YOUR

TURN!

LO: To use multiplication facts to solve division problems by reversing.

LO: To use multiplication facts to solve division problems by reversing.

LO: To use multiplication facts to solve division problems by reversing.