Maths – Thursday 14th January
First of all, check your work from yesterday and make sure that you are happy with multiplying two 2-digit numbers.
We will then look at multiplying a 3-digit by a 2-digit number using the written method shown.
Watch the examples given on the slides below and then practise using the worksheet.
Some of you will be able to work through the whole session in one go but some of you may do half today (up to and including question 4) and then do the rest tomorrow.
There is an extra question to investigate below too should you need it.
You should spend between 1 hour and 1 hour 15 minutes on this.
LESSON SLIDES
WORKSHEET
CHALLENGE
I think the answer to 25×111=2774.
I notice that the 100s and 10s are counting up from 4.
No it sometimes works.
Basicly all the columns count up or down.
Most of the numbers are even accept from 111 and 553
When does the pattern stop?
Maths worksheet
1a
=39
=390
b
=260
=2600
c
=100
=1000
d
=816
=8160
2
=12,288
3
4968
4
=4402
=11342
=15502
=4392
Well done Mia.
I think 25×111=2775.
I notice that most numbers are the same especially 2.
No it only works sometimes because it is most likely different numbers.
Basicly the number are in 2s from 24 and 4 to 26 to 6.
They are Basicly all even number accept from 553 and 111.
What do you notice about the middle two numbers?
What happens to the ones digit?
Mr Bushell
There are only 4 Maths questions on the worksheet, is that correct?
There is a second side showing questions 5 to 8.
Maths challenge
25×111=2775
I notice the two numbers in the middle In the answer are the same and the one s digit in 22,23,24,25 the numbers in the middle are 2 times higher. I don’t know if it always work’s?
This is a good thing to notice Michael – well done!
See if you can investigate further. Maybe write down the pattern of numbers and see what you notice.
2553
2664
2775
2886
2997
3108
Mr Bushell
maths:
1. a. 39 390
b. 260 2600
c. 100 1000
d. 816 8080
2. a) 293 2310
b) 512×4 512×20
3. Brett didn’t add the extra 10 and the answer is 6922
4. a) 4260 b) 15502 c) 11342 d) 4392
5. a. 310×20=6200 b. I chose this one because its the closest to each number c. Filip d. 5852 e. I don’t actually know
I got up to to here
Well done Kiran.
Try 4a again (142 x 31).
Mr Bushell
Worksheet
1) a
13
3
——
39
——
B.
130
2
———
2 6 0
———
C.25
4
——
001
——
2 2
I don’t get question 2
Hello Rihanna
For 2a, the question is 231 x 13. It has been broken down into 231 x 3 and 231 x 10. 231 x 3 is 693 and 231 x 10 is 2310. To find the overall product you would then add the two parts together (693 + 2310). Have a try!
12×4=48
12×40=480
206×3=618
206×300=61,800
132×23=3036
326×32=10,432
248×21=5,208
112×63 is the answer
Well done. Now try the worksheet.
Mr Simmons did not give me my book so I had to do it on lined paper
That’s fine Bella! Maths works on lined paper too!
Hope you’re ok.
Mr Bushell
Maths worksheet
~1~
A
13×3=39
13×30=390
B
130×2=260
130×20=2600
C
25×4=100
25×40=1000
D
204×4=816
204×40=8160
~2~
Stuck.
~3~
Stuck again
~4~
A
142×31=4402
B
Stuck
C
214×53=11342
D
24×183=4392
The questions you have answered are absolutely fine Saheera.
The idea is to multiply the 3-digit number firstly by the ones of the 2-digit and then by the tens.
So for 231 x 13 you would do 231 x 3 and then 231 x 10.
For 512 x 24 you would do 512 x 4 and then 512 x 20.
Have a go at these two and see how you get on.
Mr Bushell
Maths worksheet
1a
13×3=39
13×30=390
b
130×2=260
130×20=2600
c
25×4=100
25×40=1000
d
204×4=816
204×40=8100
2
512×24=12,288
3
4968
4
142×3=4402
214×53=11342
337×45=15502
24×193=4392
Well done Malaki. Check 204 x 40.
1) a) 39 390 b) 260 2600 c) 100 1000 d) 816 8160
2) (512×4) (512×20)
3) Insted of x by 20 he x by 2 4968
4) 4402 15502 11984 4392
5) 5700 I chose that because it is closest Filip 5852
6) 6656 m2 3,756009615384615
7) > >
8) 11152 pence
A superb effort Franek!
I do have a couple of questions:
Question 6 – It asks how many football pitches could fit inside the field. Is it possible to have 3.7560096 football pitches? What would the answer have to be?
Question 8 – Can you write 11152 pence in pounds and pence?
Then try the challenge question. Investigate it in detail!
Great work!
Mr Bushell
4?
111.52 pounds
Hello Franek
Would you be able to fit 4 whole pitches into that space?
Mr Bushell
i did half of the work sorry i didnt finish also some was quite easy so i did something
Ok.
Feel free to try the second half.
Mr Bushell
Maths
1. 13×3=39
13×30=390
130×2=260
13×20=2600
25×4=100
25×40=1000
204×4=816
204×40=8160
2. 231×13=3003
512×24=12’288
3. Brett’s mistake was putting the 18 in the wrong place. 4968
4. 142×31= 4402
214×53=11’432
337×46=15’502
24×183=4338
5. 300×20=6000-148- it is less and close is the answer.
300×19=5700-152
Filip- answer: 5852
Whitney thought less than 10x and Nijah thought up to 100x.
6. 6656
3
7. >
>
It is the same symbol.
8. 697
£111.52
25×111=2775
I notice that 111 times a number has a difference on its ones in the thousands.
Hello Hargun
Well done! You show a really good understanding.
Check 4d (24 x 183).
For the challenge, try to investigate it a little more. Each time you add 111, what do you notice about each digit? List the numbers you make and see what is the same and different.
Mr Bushell
Hi thanks for reminding me and the answer was 4392
Many thanks.
Maths
1.13 x 3 = 39
13 x 30 = 390
130 x 2 = 260
130 x 20 = 2600
25 x 4 = 100
25 x 40 = 1000
204 x 4 = 816
204 x 4 = 8160
2. 231 x 31 = 2643
512 x 24 = 3288
3. Brett carried 6 x 3 = 18 and he was not lyning the numbers up correctly.
The actual answer is 4860
4. 142 x 31 = 4402
214 x 53 = 20742
337 x 46 = 16102
24 x 183 = 4392
Hello Talal
Question 1 and 4a and 4d are fine. Double check the others.
Don’t forget that you multiply the 3-digit number by the ones digit of the 2-digit number, and then by the tens digit.
You can then add the 2 parts together.
Mr Bushell
25×111=2775
Alex has the correct answer.
112×63 is bigger than 181×2
380×24=9120
Worksheet
1.
A. 13×3=39
13×30=390
B. 130×2=260
130×20=2600
C. 25×4=100
25×40=1000
D. 204×4=816
204×40=8160
2.
231×13=3003
512×24=12288
(512×4) ( 512×20)
3.
216×23=4968
Brett made a mistake by putting his calculations in the wrong columns
4.
A. 142×31=4402
B. 337×46=15302
C. 214×53=11342
24×183=6392
Challenge
The answer is 2775.
I notice that the numbers are increasing by 111.
Yes.
Hello Alex
Overall, you have done well here. Check 4b and 4d.
Feel free to carry on with questions 5 onwards.
For the challenge, look carefully at the patterns formed by adding 11 each time. How do the digits change?
Mr Bushell
3 sorry
I notice that the numbers go up by 111 and the last number from the answer is the same as the last number to the digit in the question.
It only works if the question has 11 in it.
i did half of because it was difficult some were quite easy and i am exhausted