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What does10 × 4 mean?
Yes we can cross out a row of 4 strawberries.
9 × 4 is one row fewer than 10 × 4, so if we know that 10 × 4 is 40, 9 × 4 will be 4 less than 40, so 40 – 4 = 36.
The other strategy is the doubling of groups, which you learnt in the previous lesson.
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Maths
In this lesson we are using patterns in the 4 times table to help us remember the 4 times table easily.
Let’s look at the picture from the In Focus task. How are the strawberries arranged?
Well done they are arranged in 10 rows of 4, so, we can write it down as 10 × 4 = 40.
What does10 × 4 mean?
Great it does mean '10 groups of 4'.
How would we work out 9 × 4 if we know 10 × 4 = 40?
Yes we can cross out a row of 4 strawberries.
Now we have 9 rows of 4, which can be written as 9 × 4 = 36.
9 × 4 is one row fewer than 10 × 4, so if we know that 10 × 4 is 40, 9 × 4 will be 4 less than 40, so 40 – 4 = 36.
Can you see that in the 4 times table, the previous number is always 4 less? Therefore, if we know that 10 × 4 = 40, we can find 9 × 4 by subtracting 4 from 40.
You can use the method above for all times tables.
The other strategy is the doubling of groups, which you learnt in the previous lesson.
If 2 groups of 4 is 2 × 4 = 8, what are 4 groups of 4 and 8 groups of 4?
During Guided Practice, you are practising the two strategies.
Click on the pictures to enlarge them.
Now complete the workbook pages in your blended learning book at home or in your workbook at school.