L.O.1
To be able to count on or back in steps of
0.1; 0.2; 0.3…..
To be able to use known facts and place
value to multiply mentally.
0
We are going to count in steps of 0.6
0
What is 0.6 x 5 ?
0.6 x 9 ?
0.6 x 7 ?
0.6 x 4 ?
0
We are going to count in steps of 0.7
0
What is 0.7 x 7 ?
0.7 x 3 ?
0.7 x 5 ?
0.7 x 4 ?
0
We are going to count in steps of 0.8
0
What is 0.8 x 4 ?
0.8 x 9 ?
0.8 x 6 ?
0.8 x 7 ?
0
We are going to count in steps of 0.9
0
What is 0.9 x 6 ?
0.9 x 9 ?
0.9 x 3 ?
0.9 x 5 ?
L.O.2
To be able to extend written methods to
multiplication of U.t x U
To be able to approximate first.
Q. How would you calculate 57 x 6?
Q. How would you calculate 5.7 x 6?
Answers please……..
Q. How would you approximate the answer?
Look:
X
5
0.7
6
30
4.2
34.2
If you find it hard to calculate 0.7 x 6 try counting on in 0.7s
and see if your answer is one tenth of 7x6.
Complete the worksheet.
Work in pairs.
5 minutes
Here is a problem:
If 26 children each have a ruler measuring
30cm. and they are arranged end to end to
form a line, how long would the line of rulers
be?
With a partner think about how you would do this.
We would need to do the calculation 30cm x 26.
We can write this as 0.3m. x 26 !
These numbers allow the calculation to be done mentally
i.e
3 x 26 and make it 10 times bigger for 30cm
3 x 26 and make it 10 times smaller for 0.3
780cm
7.8m.
Try doing the problem if the rulers each
measure 32 cm.
Half of you are to work in cm. & the other half in metres.
Remember to approximate first.
Q. Will the answers be the same?
6.3 x 7 = 42.21
Q. Is the answer correct?
Has anything gone wrong?
Why?
6.5 x 4
Q. How would you work out the answer ?
Is there an easier way?
Mentally. the 0.5
By the end of the lesson the children should
be able to:
Approximate first;
Multiply a simple decimal with one
decimal place by a single digit.