Giraffe Class Maths

Term 5 Week 4 Activities

Measurement: Perimeter.

2D and 3D shapes.

Introduction

• This week, we are going to focus on learning about 2D and 3D shapes, finishing our topic of measurement and moving on to geometry.

• We are going to: – Measurement

– measure the perimeter of simple 2-D shapes

– Geometry – properties of shapes

– draw 2-D shapes

– make 3-D shapes using modelling materials

– recognise 3-D shapes in different orientations and describe them

• I’d also like you to spend at least half an hour each week on Professor Assessor and the same on Mathletics. This might be revising topics we have already covered, work on our current topics, or times tables practise. I will set you specific tasks on these websites for you to complete.

Professor Assessor (at least 30 minutes)

• Professor Assessor is really important because it gives your teachers and TAs, as well as yourselves and your parents, the chance to analyse your learning and track your progress.

• For the last two weeks, on Professor Assessor, I set you a ‘Home Learning’ Activity on Time, called ‘Time 1’.

• Well done if you completed it! • This week, I have set another Home Learning Activity on Time,

called ‘Time 2’. • Once you finish that, I will set another Home Learning Activity on

Measurement, called ‘Measurement 1’ – I will keep checking the website through the week!

• Please log in and complete the work if you haven’t already! • You were sent home with your login details in your home learning

packs. To access the site, please click on the link: https://www.prof123.co.uk/Start.

• The school code is: BRN

Mathletics (at least 30 minutes)

• Just like Professor Assessor, Mathletics is really important because it gives your teachers and TAs, as well as yourselves and your parents, the chance to analyse your learning and track your progress.

• On Mathletics, I recently set you some tasks on Time. Well done if you have completed them! If you haven’t yet, please have a go!

• Please prioritise (do them first) these Time activities over the other activities that I have set you.

• I have not set further whole class tasks this week, as there are lots of tasks to do already on Time, Measurement, and Statistics.

• However, if you have completed all of the tasks, I have set you further tasks – log in and have a go!

• https://www.mathletics.com/uk/

Last Week’s Learning Term 5 Week 3

The Answers!

Did you watch the video? Task 1: Days in each month (10 minutes) Watch the video, and revise the poem!

The key images are on the following pages.

• H2 HOW MANY DAYS IN EACH MONTH?

• https://www.youtube.com/watch?v=F5ws_cdY3WA

Answers! Task 2: Days in each month! Quiz! (10-15 minutes)

How many days are there in the following months? 1. January 31 2. February 28 3. March 31 4. April 30 5. May 31 6. June 30 7. July 31 8. August 31 9. September 30 10. October 31 11. November 30 12. December 31 13. February in a Leap Year 29

(Some addition is required here!) 14. How many days are there in a normal year? (30 x 4) + (31 x 7) + 28 = 120 + 217 + 28 = 365 15. How many days are there in a leap year? Just add 1 = 365 + 1 = 366

Answers! Task 3: Challenge Time Questions! (15-20 minutes)

1. How many days are there altogether if you add together all the months with 30 days? 120

2. How many days are there altogether if you add together all the months with 31 days? 217

3. How many days are left if you take away the answer to number 1 from the answer to number 2? 97

4. How many days are there in a week? 7 5. How many weeks are there in a year? (You will need

to divide the number of days in a year by your answer to number 4). Use the short division method. 52

6. How many days are there in 10 years? 10 x 365 = 3650, and if you add in the Leap Years at Years 4 and 8, it makes it 3652!

Answers! Task 3: Challenge Time Questions - continued! (You might want to find some of these out on the Internet!)

7. How often do leap years occur? Why do we have leap years? A leap year occurs every four years to help synchronize the calendar year with the solar year, or the length of time it takes the earth to complete its orbit around the sun, which is about 365 ¼ days. 8. Why do we have the measurement of a year? What does it represent? (See answer to Q7) 9. Why do the clocks change twice a year? The main purpose of Daylight Saving Time (called "Summer Time" in many places in the world) is to make better use of daylight. We change our clocks during the summer months to move an hour of daylight from the morning to the evening. 10. On which date do the clocks go back this autumn (2020)? Sunday 25th October. 11. How many years are there in a century? 100 (one hundred) 12. How many years are there in a millennium? 1000 (one thousand)

Answers! Task 4: Adding and Subtracting Times (10 minutes)

11:52 am

3:42 pm

5:15 pm

1:15 pm

1:30 pm

12:48 am

3

10 4

6

Answers! Task 5: Adding

Times (10 minutes)

Draw a number line like they have started doing for each question to help you. I’d count up in 5 minute jumps for a, 2s or 4s for b, and 5s for c. Using a clock face would help you, either a real one or a drawn one!

8 25 am

5 50 pm

2 20 pm

Answers! Task 6: Adding and

Subtracting Time (10 minutes)

Reading tables is a life skill and something that you will need to do even as an adult! Remember to read tables across the way (rows) from left to right and down the way (columns) from top to bottom.

13:30

Spooky Movie

15 minutes

12:30 pm

Answers! Tasks 7a and 7b: Adding Times Miss Pickup’s Model

(For 7c and d, do the same thing, only you will need to go backwards down the number line, rather than forwards!)

Answers! Tasks 7a and 7b: Adding Times (10 minutes)

11:00 am

11:55am

12:05 pm

11:15am

12:05pm

12:25 pm

Answers! Tasks 7c and 7d: Subtracting Times (10 minutes)

6:05 pm

7:10 pm

6:40 pm

5:20pm

10:50 pm

9:55 pm

9:50 pm

9:35 pm

Answers! Tasks 8, 9, 10, 11 and 12

• This term, we have been working with the measurement of time (minutes, hours, days, months, years).

• In Term 4, we were working with other measurements: • lengths (m/cm/mm);

• mass (kg/g);

• volume/capacity (l/ml)

• money (£/p)

• Tasks 8, 9, 10, 11 and 12 are focused on revising our knowledge of these other measurements.

Answers! Task 8

• You will need to read a table again for Task 8. • Make sure you follow the rows across carefully to

find information on each dinosaur. • You will need to do some careful addition and

subtraction to find out the answers to some of the questions, and compare the lengths carefully.

Rounding Help: Rounding to the nearest 10: • We round UP if the last digit is 5 or above.

– E.g. 15, 16, 17, 18 and 19 would all round UP to 20.

• We round DOWN if the last digit is 4 or below. – E.g. 14, 13, 12, and 11 would all round DOWN to 10.

• If the last digit is 0, you’re already on a 10, so there is no need to round – the number stays the same. – E.g. 20 would still be 20.

Answers! Task 8

(15 minutes)

26

20 30 30 20 10 10

2 3 6

7

5

4

21

11

3 x 9 = 27, so No

7 + 9 + 12 = 28, so Yes

Answers! Task 9

• This task is all about comparing things, and working out which is the:

– fastest or slowest

– lightest or heaviest

– shortest or longest

• e.g.

1. The top pencil is the shortest, at 5cm.

2. The middle pencil is next, at 7cm.

3. The bottom pencil is the longest, at 9cm.

Answers! Task 9

(10 minutes)

1 2

3 4

6

7

5

8

Usain Bolt Beth Sam Usain Bolt Beth Sam

2 grapes 2 apples 2 potatoes

Yellow pencil

Blue pencil

Green pencil

Lemon cake

Chocolate cake

Cream cake

3 grapes 3 apples 3 potatoes

Yellow pencil

Blue pencil

Green pencil

Lemon cake

Chocolate cake

Cream cake

Answers! Task 10

Remember:

• 1 litre = 1000 millilitres (1l = 1000ml)

• ½ litre = 500 millilitres

• ¼ litre = 250 millilitres

Converting between units:

• We can convert millilitres to litres like this:

– 1200ml = 1 litre, 200ml

• And litres to millilitres like this:

– 1 ½ litres = 1 litre 500ml = 1500ml

Answers! Task 10

(10 minutes)

1200ml or 1l 200ml

350ml

10 servings

Answers! Task 11

Reading the measurements:

• Most measurements we look at work in 10s, (and then go on to 100s, and 1000s).

• Quite a lot of measurements we use in everyday life use quite rounded numbers – for example, you’d never be asked to put 203 grams of flour into a recipe, or 47 millilitres of milk in!

• We tend to use whole tens, such as 200 and 50, of use fives to be more precise, such as 250, or 45.

• Lots of devices for measuring have the tens marked as main numbers, and then a line halfway between each, signalling the five.

Answers! Task 11

(10 minutes)

35

45 65 25

75

5.5 3.5

65 15 45

Answers! Task 12: (20 minutes)

Number these from 1 to 9.

Work out how much change you would get.

Here’s how to do No. 1: I have £2. That is 200p. Each cupcake costs 45p. 45p + 45p + 45p = 135p

200p – 135p = 65p So I have 65p or £0.65

change.

Now, you do 2-9!

65p/ £0.65

79p/ £0.79

£5.20

£2.13

£6.92

53p/ £0.53

55p/ £0.55

£5.12

75p/ £0.75

This Week’s Learning Term 5 Week 4

Your Tasks!

What are 2D Shapes?

• Watch this video and do the activities to help you revise what 2D Shapes are:

• https://www.bbc.co.uk/bitesize/topics/zjv39j6/articles/ztpwdmn

Here are some common 2D Shapes:

Shapes with these numbers of sides are called:

Common 2D Shapes: Did you know that there are different types of triangles?

Polygons and Irregular Polygons: A polygon is a shape with straight sides. If all of the sides and the internal (inside) angles

are the same size, the shape is a regular polygon. If they are not, the shape is irregular.

How to Measure the Perimeter of 2D Shapes

Calculating the Perimeter:

• The perimeter is the distance all the way around the outside of a 2D shape.

• To work out the perimeter, add up the lengths of all the sides.

• E.g. The perimeter of this shape is 8 + 8 + 5 + 5 = 26 cm.

Task 1: How to Measure the Perimeter of 2D Shapes (5-10 minutes)

Calculating the Perimeter: • Watch this video about how to work out the perimeter

of 2D shapes, then do the two questions underneath. You will need to drag and drop each digit of the answer into place.

• https://www.bbc.co.uk/bitesize/topics/zvmxsbk/articles/zsr4k7h

How to Measure the Perimeter of 2D Shapes

Task 2: Easy: Measure the Perimeter of these 2D Shapes (10 minutes)

Task 3: Easy: Measure the

Perimeter of these 2D

Shapes (10-15

minutes)

How to Measure the Perimeter of 2D Shapes

• To work out the perimeter of shapes other than rectangles, use the same method – just add up the lengths of all the sides.

• E.g. To find the perimeter of the shape below, you would add up like this:

• 8 + 6 + 6 + 4 = 24cm.

Task 4: Middle: Measure the Perimeter of these 2D Shapes (10-15 minutes)

Task 5: Middle: Measure the Perimeter of these 2D Shapes (15-20 minutes)

Task 6: Challenge:

Measure the Perimeter

of these 2D Shapes

(15-20

minutes)

N.B. Each square

measures 1cm by 1cm.

Task 7: Stretch! Perimeter of 2D Shapes (25-30 minutes)

Task 8: Drawing 2D Shapes (15 minutes)

• Use the dotty paper on the next page to practise drawing:

1. A rectangle

2. A square

3. A triangle

4. An octagon

• Either print out the paper, or draw with your finger gently on the screen!

What are 3D Shapes?

• Watch this video and do the activities to help you revise what 3D Shapes are:

• https://www.bbc.co.uk/bitesize/topics/zjv39j6/articles/zcsjqty

Here are some common 3D Shapes:

Task 9: Making 3D Shapes (20-30 minutes)

• Use any craft items you have at home, and make some of the 3D Shapes on the previous page. See the examples on the next page for inspiration and ideas!

• Challenge: make a robot figure out of 3D shapes! (See next page but one!)

• You could use: – Straws – Card – Paper – Sellotape – Blue-Tac, plasticine, or play-dough – Pipe cleaners – Wire

• Photograph it and send the photo to the class email account! (giraffes@bratton.wilts.sch.uk)

Task 9: Making 3D Shapes (20-30 minutes)

Task 9: Making 3D Shapes (20-30 minutes)

Task 10: Identifying 3D

Shapes (15 minutes)

Can you

decide which name belongs

to each of these 7 shapes?

Task 11:

Identifying 3D Shapes

(15 minutes)

Can you name each shape, and tell me how

many faces it has?

1 2 3

4 5 6

Task 12: Identifying 3D Shapes (15 minutes) Match these shapes to their images and descriptions: N.B. vertices = corners e.g. cube = 1e cuboid = cylinder = cone = sphere = prism = pyramid =

1

7

2

3

4

5

6

a

g

b

c

d

e

f

Mathsframe

• https://mathsframe.co.uk/

• This is the site we often use for maths games in school. If you have any free time, and you’ve done all the other activities, perhaps you’d like to spend some time on here!