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Maths and Numeracy Tasks Week 9

Multiplication and Division

 

This week we will be focusing on multiplication -clever counting in 2s ,3s, 5s and 10s and knowing the mathematical language                     3 times 5 = 15   3 lots of 5 = 15     3 multiplied by 5 =15.

 

We will also be showing multiplication as arrays -knowing that  3 x 4=12

                                                                                           and 4 x 3=12

 

We will then look at related division facts  eg if we know 2 x 4 = 8  then 8 ÷ 4 is 2.

Counting in 3s

 

Practise counting in 3s,  forwards and then backwards.

Write your own counting in 3s number line and choose a Lego character to jump along it, saying the numbers.

Where will he/she land after 3 jumps of 3 ...  5 jumps of 3 ....  6 times 3?

Number arrays

 

An arrangement of objects, pictures or numbers in columns and rows is called an array.

Arrays are useful to develop understanding of multiplication concepts.

 

Here are some pictures of number arrays.

The first shows       6 x 3= 18       or       3 x 6 = 18

The second shows    6 x 4 = 24      or      4 x 6 = 24

 

Perhaps have a go at arranging coins, shells, Lego etc into a number array.

Take a picture and upload it on J2e - we'd love to see them!

 

 

Multiplication and Division

 

Over the year , the children have learnt that addition and subtraction are related and know different 'fact families' 

eg 5+3=8   3+5 = 8    8-3=5   8-5=3

 

20+10=30   10+20=30   30-10=20   30 -20=10

 

The children should now start to understand that multiplication and division are inverse operations.

 

Number stories are a good way to show and explain this

eg There are 3 trees in a garden, each tree has 5 birds on it. How many birds are there altogether?  3x5=15      (5+5+5=15)

 

If there are 15 birds and three trees, how many birds will be on each tree?   15÷3=5     15÷5=3

 

See if you can think of some multiplication and division number stories of your own  linked to favourite toys, animals, favourite fruits/treats etc

Reasoning and Problem Solving Challenge
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