year 4 gorillas term 2 unit 10
DESCRIPTION
Year 4 Gorillas Term 2 Unit 10. Day 1. L.O.1 To be able to derive quickly two-digit pairs that total 100 To add several two-digit numbers. Different numbers will be shown. Your job is to write the complement to 100. 306020 903575 154575 56585. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/1.jpg)
Year 4 Gorillas Term 2 Unit 10
Day 1
![Page 2: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/2.jpg)
L.O.1
To be able to derive quickly two-digit pairs that total 100
To add several two-digit numbers
![Page 3: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/3.jpg)
Different numbers will be shown. Your job is to write the complement to 100.
30 60 20
90 35 75
15 45 75
5 65 85
![Page 4: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/4.jpg)
Quickly copy this number grid into your books
![Page 5: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/5.jpg)
Do these:
1. Which number is nearest 100?
2. Which pair of numbers total 100?
3. What is the sum of the top row?
4. What is the sum of the bottom corners?
5. What is the total of the middle column?
6. Add the bottom row.
7. Sum the diagonal from the top left.
8. Total the numbers under 40.
9. Add the two highest numbers.
10. Find the sum of the left-hand column.
![Page 6: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/6.jpg)
L.O.2
To be able to extend written methods to column addition of two integers less than 10 000
![Page 7: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/7.jpg)
3587 purchased advance tickets for the final home game of the season at Boston United. A
further 675 people bought tickets on the gate. How many people attended the game altogether?
Q. What calculation do we need to do to work out the answer to this problem.
![Page 8: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/8.jpg)
The calculation is addition.
REMEMBER …
This is the COLUMN method of addition:
468 468
468+276 + 276 + 276
400 + 200 = 600 600 14
60 + 70 = 130 130 130
8 + 6 = 14 14 600
744 744 744
![Page 9: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/9.jpg)
We’ll do this in the same way but add the most significant digits first.
3 5 8 7
+ 6 7 5
Q. How many thousands will there be? 3 0 0 0
Q. How many hundreds will there be? 1 1 0 0
Q. How many tens will there be? 1 5 0
Q. How many units will there be? 1 2
Q. What is the total? 4 2 6 2NOTICE : THE FIGURES ARE IN STRAIGHT COLUMNS!
![Page 10: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/10.jpg)
Do these using the COLUMN method and starting with the most significant digit.
Keep your digits in straight columns.
1. Imelda Marcos bought 2356 pairs of shoes in 1998 and 947 pairs the following year. How many pairs of shoes had she altogether?
2. Prince Charles owns 8894 acres of land in Cornwall and 658 acres in Norfolk. How much land has he?
3. When Granny sold the last of her jewels she made £2486. Her jewel sale last year brought her £828 and the year before that £593. How much did she make altogether?
![Page 11: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/11.jpg)
We’ll do this one together:
5709 + 3296
![Page 12: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/12.jpg)
Let’s try this but begin with the least significant digit.
4736 + 582
4 7 3 6
+ 5 8 2
8
1 1 0
1 2 0 0
4 0 0 0
5 3 1 8
![Page 13: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/13.jpg)
Do this. Use either method but be prepared to explain your reasoning.
6285 + 445
![Page 14: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/14.jpg)
By the end of the lesson the children should be able to :
Use a written column method to add a
four-digit to a three-digit number by adding the most significant digit first
or the least significant digit first.
Discuss, explain and compare methods.
![Page 15: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/15.jpg)
Year 4 Gorillas Term 2 Unit 10
Day 2
![Page 16: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/16.jpg)
L.O.1
To be able to count on and back in equal steps.
To use known number facts and place value for mental addition.
![Page 17: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/17.jpg)
We are going to count on and back in steps of 0.1 beginning at different points from 0 to 1
1
0
![Page 18: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/18.jpg)
We are going to count on and back in steps of 0.1 beginning at different points from 1 to 2
2
1
![Page 19: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/19.jpg)
We are going to count on and back in steps of 0.2 beginning at different points from 0 to 2
2
0
![Page 20: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/20.jpg)
We are going to count on and back in steps of 0.5 beginning at different points from 0 to 5
5
0
![Page 21: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/21.jpg)
1.2 0.6 2.7 3.3
0.8 0.2 4.4 3.8 6.1
Find a pair of numbers which add to :
1, 2, 4, 5, 6
![Page 22: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/22.jpg)
.
2.5 5.4 1.2 1.8
2.7 3.5 1.5 6.8 2.3
6.6 3.4 1.9 4.5 4.2
Find three numbers which make:
6, 7, 10
1.8 1.9 2.3 2.5 2.7 1.8 1.2 3.4 5.4
![Page 23: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/23.jpg)
.
2.5 5.4 1.2 1.8
2.7 3.5 1.5 6.8 2.3
6.6 3.4 1.9 4.5 4.2
Find four numbers which make:
12, 13
1.5 2.5 3.5 4.5 6.8 1.2 2.3 2.7
![Page 24: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/24.jpg)
L.O.2
To be able to use column written methods to add two or more decimals.
![Page 25: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/25.jpg)
Last week I spent £48.76 at the supermarket.
This week I spent £37.53.
How much did I spend altogether?
Q. What calculation do we need to carry out?+
Q. How could we work this out?
Q. What would you estimate the answer to be?
![Page 26: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/26.jpg)
We shall use a similar written method of addition to that used in the last lesson.
4 8.7 6 3 7.5 3
7 0.0 0 1 5.0 0 1.2 0 0.0 9
8 6.2 9Q. Does this answer seem reasonable?
![Page 27: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/27.jpg)
Let’s try this one.
We shall begin by adding the least significant digit. Your assistance is required!
14.78 m. + 26.24 m
Where shall we start?
![Page 28: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/28.jpg)
You will be given a worksheet to do.
Begin each problem by adding the
least significant digit.
REMEMBER :
ESTIMATE B4U CALCULATE
![Page 29: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/29.jpg)
At the Funfair the rides are priced as follows:
White Knuckle £1.65
Dodgems £0.90
Wall of Death £2.30
Space Wheel £1.25
1. How much is it to go on each ride once?
2. If I have £4.00 to spend which rides could I go on?
3. How much does it cost to go on the Space Wheel three times and the White Knuckle twice?
4. Granny is afraid of the Dodgems but likes all the other rides. How much does she spend if she goes on each one twice?
![Page 30: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/30.jpg)
By the end of the lesson the children should be able to:
Use a written column method to add two or more decimal numbers;
Know that a decimal points should link up under each other;
Solve mathematical problems involving money and measures.
![Page 31: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/31.jpg)
Year 4 Gorillas Term 2 Unit 10
Day 3
![Page 32: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/32.jpg)
L.O.1
To have a rapid recall of multiplication facts.
![Page 33: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/33.jpg)
Let’s say our tables (twice) :
6x 8x 9x
and answer some questions about them.
Answer the questions using number fans.
![Page 34: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/34.jpg)
Now ask your partner to recite the same
tables and then ask them questions.
5 minutes
![Page 35: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/35.jpg)
Do these:
7 x 8 = 5 x 6 = 8 x 8 =
8 x 9 = 7 x 6 = 9 x 5 =
70 x 8 = 0.5 x 6 = 800 x 8 =
8 x 0.9 = 70 x 60 = 0.9 x 0.5=
![Page 36: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/36.jpg)
L.O.2
To be able to subtract whole numbers
with up to four digits using a written
column method.
![Page 37: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/37.jpg)
3450 people attend a football match. At half time 867 people leave. How many people stay to the end of the match?
Q. What calculation must we carry out to work out the answer?
-
Q. How could we estimate the answer?
Q. What is a sensible estimate?
2500
![Page 38: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/38.jpg)
Remember the complementary addition method used to work out the answer to a problem?
867 900 1000 3000 3450
+33 +100 +2000 +450
The jumps are to and from 100’s and 1000’s as this helps make the addition easier.
Is the answer ( 2583 ) close to the estimate of 2500 ?
![Page 39: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/39.jpg)
The sum can be set out using the column method.
867 900 1000 3000 3450
+33 +100 +2000 +450
3450
- 867
33 to make 900
100 to make 1000
2000 to make 3000
450 to make 3450
2583 Answer is 2583 c.f. the estimate of 2500
![Page 40: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/40.jpg)
2340 - 758
Q. What calculation must we carry out to work out the answer?
Q. How could we estimate the answer?
Q. What is a sensible estimate?
1500
![Page 41: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/41.jpg)
Remember the complementary addition method used to work out the answer to a problem?
758 800 1000 2340
Is the answer ( 1582 ) close to our estimate?
+42 +200 +1340
![Page 42: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/42.jpg)
The sum can be set out using the column method.
758 800 1000 2340
+42 +200 +1340
2340
- 758
42 to make 800
200 to make 1000
1340 to make 2340
1582 Answer is 1582 c.f. the estimate of 1500
![Page 43: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/43.jpg)
Try these with a partner. Agree an
estimate before B4U calculate.
ALL 1. 832 - 645
2. 733 - 1609
3. 8976 - 543
4. 573 - 67
PRISMS 5. 6571 - 89
6. 4773 - 882
![Page 44: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/44.jpg)
3450 - 867 = 2583
Q. What is the answer to 2583 + 867?
Why?
Q. Is there a connection between addition and subtraction? If so, what is it?
![Page 45: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/45.jpg)
Does the same rule apply here?
30 – 10 = 20 : 20 + 10 = ____
88 – 36 = 52 : 52 + 36 = ____
45 – 18 = 27 : 27 + 18 = ____
76 – 42 = 35 : 35 + 42 = ____
![Page 46: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/46.jpg)
Copy and complete :
2733 – 1609 = 1124 : 1124 + 1609 = _____
![Page 47: Year 4 Gorillas Term 2 Unit 10](https://reader036.vdocument.in/reader036/viewer/2022062321/568137b7550346895d9f57d3/html5/thumbnails/47.jpg)
By the end of the lesson the children should be able to:
Subtract pairs of numbers involving a different number of digits by counting up;
Find an estimate and check answers;
Use the relationship between addition and subtraction to check answers