Recognise and represent multiplication as repeated addition, groups and arrays(ACMNA031)
LO: To recognise that multiplication is repeated addition, groups and arrays.
- How to add
- Addition facts
- How to group items into given numbers
- Basic multiplication facts
- That multiplication can be represented as repeated addition.
- I can recognise and represent multiplication as repeated addition, groups of or arrays.
Multiplication is Repeated Addition
Multiplication is just adding over and over again.
If you look at the picture, if I have 5 groups of 3 that’s the same as 3 + 3 + 3 + 3 + 3, which means that I have 5 lots of 3. So, 5 x 3 = 15.
In this picture, I have 4 lots of 3 stars.
So I can go 3 + 3 + 3 + 3 = 12, or to make it easier and quicker I can go 3 x 4 = 12.
Multiplication as Groups Of
Multiplication can also be groups of.
I can group the flowers into groups of 3, which means that each group will have 3 flowers in it.
If I have 4 groups, and each group has 3 flowers in it, it would mean that I would have 12 flowers in total.
I can group the apples into groups of 5, which means that each group has 5 apples.
If I have 5 groups and each group has 5 apples each, I would mean that I have 25 apples in total.
Multiplication as an Array
One way to demonstrate multiplication is using an array. An array is just a picture that shows equal groups in rows and columns. Each row should have the same number of items in it, and each column should also have the same number of items in it.
This is an array with 4 columns and 5 rows.
Multiplication Can be Represented in Many Different Ways
Multiplication can be represented in many ways. It can be shown as repeated addition, groups of and arrays.
Similarities and Differences