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Year 4 Block E - Securing number facts, relationships and calculating Unit 3

Objectives

Children's learning outcomes are emphasised
Assessment for learning
  • Represent a puzzle or problem using number sentences, statements or diagrams; use these to solve the problem; present and interpret the solution in the context of the problem

    I can write down number sentences or drawings to help me solve a problem
    When I have solved a problem I re-read the question to make sure that it makes sense

There are 10 girls and 20 boys in Jill's class. Jill said that there is one girl for every two boys. Her friend Amanda said that means one half of all the children in the class are girls.

Is Jill right? Use words or pictures to explain why.

Is Amanda right? Use words or pictures to explain why.

A piece of rope 204 cm long is cut into four equal pieces. Which of these gives the length of each piece in centimetres?

A 204 ÷ 4 B 204 × 4 C 204 - 4 D 204 plus 4

Sita worked out the correct answer to 16 × 5. Her answer was 80.

Show how she could have worked out her answer.

Harry worked out the correct answer to 70 ÷ 5. His answer was 14.

Show how he could have worked out his answer.

  • Derive and recall multiplication facts up to 10 × 10, the corresponding division facts and multiples of numbers to 10 up to the tenth multiple

    I know all multiplication facts up to 10 × 10,even when they are not in the right order

How many different multiplication and division facts can you make using what you know about 56?

What if you started with 560?

  • Develop and use written methods to record, support and explain multiplication and division of two-digit numbers by a one-digit number, including division with remainders (e.g. 15 × 9, 98 ÷ 6)

    I can use a written method to multiply a two-digit number by a one-digit number
    I can use a written method to divide a two-digit number by a one-digit number and find the remainder

Tell me some division questions that have the answer 15. How did you go about working this out?

Make up some division questions that have a remainder of 3. How did you do it?

Talk me through the method that you used to calculate 56 × 7.

Is this division correct? How do you know? How could we put it right?

Parveen buys 3 small bags of peanuts. She gives the shop keeper £2 and gets 80p change. What is the cost in pence of one bag of peanuts? Tell me how you worked out the answer to this problem.

  • Use diagrams to identify equivalent fractions (e.g. six eighths and three quarters, or seven hundredths and seven tenths); interpret mixed numbers and position them on a number line (e.g. 3 one half)

    I can use a 2 by 5 rectangle to show you that one fifth is the same as two tenths
    I can place mixed numbers in the correct place on a number line

Tell me some fractions that are equivalent to one third. How do you know? Are there any others? What about two thirds?

How do you know that two fractions are equivalent?

Two of these shapes have three quarters shaded. Point to them. Explain how you know.

5 squares divided into grids or triangles

Tell me some fractions that are greater than one half. How do you know? What about fractions that are greater than 1?

I ate more than one half a pizza but less than three quarters.What fraction could I have eaten?

What would you prefer: 3 pizzas shared between 4 people or 6 pizzas shared between 10 people? Explain why.

  • Recognise the equivalence between decimal and fraction forms of one half, quarters, tenths and hundredths

    I know that one half can also be written as 0.5, one quarter as 0.25 and three quarters as 0.75
    I know that one tenth can be written as one tenth or as 0.1 and that one hundredth can be written as one one hundredth or 0.01
    I know that twenty five hundredths is the same as 0.25. It is also the same as one quarter

Which of these decimals meansseven tenths?

A 70 B 7 C 0.7 D 0.07

Which of these fractions is the same as nought point four?

one quarter, one fortieth, one four-hundredth, four tenths, four hundredths

  • Find fractions of numbers, quantities or shapes (e.g. one fifth of 30 plums, three eights of a 6 by 4 rectangle)

    I can find the fraction of an amount, such as two fifths of £10

Which would you rather have: one third of £30 or one fifth of £60? Why?

Which would you prefer to receive as pocket money: five sixths of £24 or three sevenths of £49? Why?
  • Use the vocabulary of ratio and proportion to describe the relationship between two quantities (e.g. 'There are 2 red beads to every 3 blue beads, or 2 beads in every 5 beads are red'); estimate a proportion (e.g. 'About one quarter of the apples in the box are green')

    I can solve simple ratio and proportion problems

One in every three of these beads is red. What fraction of the beads is red?

Create a word problem that uses the words 'in every'.

In this diagram, 2 out of every 3 squares are shaded.

A 2 by 3 grid with 4 squares shaded

Which diagram has 3 out of every 4 squares shaded?

4 grids; A has 3 squares, B 4, C 2 by 4 and D 6

In a book of stamps, there are 2 red stamps to every 5 green stamps. There are 15 green stamps in the book. How many red stamps are there?

For every soft drink that Fred collected, Maria collected 3. Fred collected a total of 9 soft drinks. How many did Maria collect?

A 3 B 12 C 13 D 27

Create a word problem that uses the words 'to every'.

  • Use time, resources and group members efficiently by distributing tasks, checking progress and making back-up plans

    I can work in a group to quickly sort a set of mixed numbers
    I can work with a group of other children to discuss and plan how we will solve a problem

This set of cards has mixed numbers written on them.

In your group, put the cards in order.

Learning overview

Using number lines and fraction walls, children begin to recognise the relative sizes of different fractions. They sort a set of fractions into those less than and those greater than a half. They notice that for fractions less than a half the numerator is less than half the denominator. They count on and back in halves, quarters, fifths and tenths. They recognise that fractions are numbers and place a set of fractions such as multiples of one quarter on a number line. Working in groups they order a set of mixed numbers such as 3 one half, 4one half, 2three quarters and place them on a number line, deciding among themselves how to distribute the tasks and resources effectively.

Children continue to use shapes and other diagrams to explore the equivalence between sets of fractions such as fifths and tenths.

Children continue to reinforce the equivalence of one half, one quarter, three quarters, tenths and hundredths, and their decimal representations. On a 0 to 2 number line they place tenths represented as fractions and then do the same using decimals. Children explore further the fraction and decimal equivalence of hundredths. Using a blank 100-square they label the squares one hundredth, two hundredths, three hundredths, and so on. They then label the squares using decimal notation to help them to see the equivalence. They recognise that 0.25 is 25 hundredths, and that this is one quarter.

Children find fractions of numbers, shapes and quantities, responding to questions such as:

What fraction of 1 metre is 25 cm?
What is one fifth of £1?
There are 300 children in Bigham School. Four fifths of the children went on a school visit. How many children were left at school?
There are 36 children in the class. In their lunch boxes, half of them have a red apple and one third of them have a green apple. The rest have no apple. How many children have an apple?

Children continue to count forwards and backwards in different steps. They recall or can derive quickly all multiplication and division facts up to 10 multiplied by 10. They continue to use place value to derive related facts, such as 540 ÷ 9.

They refine their written methods for multiplying and dividing TU by U, including remainders.

38 × 7 = (30 × 7) plus (8 × 7) = 210 plus 56 = 266

vertical multiplication showing 38 multiplied by 7

vertical multiplication showing 38 multiplied by 7

vertical multiplication showing 38 multiplied by 7

96 divided by 7 showing remainder

96 divided by 7 showing remainder

Answer: 13 R 5

Children are introduced to the vocabulary of ratio and proportion. They relate fractions to finding a proportion. They describe a proportion using the language of 'in every', for example 'I spend 5 days in every week in school', recognising that this means 'I spend 10 days in every 2 weeks at school'. Children meet the vocabulary 'for every' and 'to every' in everyday statements such as 'I have 1 thumb for every 4 fingers' or 'There are 2 apples to every 1 banana in the bowl'. They recognise that the bowl of fruit has twice as many bananas as apples but that there could be 2 apples and 1 banana, 4 apples and 2 bananas, 6 apples and 3 bananas, and so on. Using two colours, they design a repeating pattern of coloured squares such as blue, blue, red, blue, blue, red, ... They notice there are 2 blue squares to/for every 1 red square, 4 blue squares to/for every 2 red squares, and so on. They notice also that 1 in every 3 squares is red and that 2 in every 3 squares are blue. They establish that there are twice as many blue squares as red squares. They use fractions to state these proportions, since one third of the squares are red and two thirds are blue. They go on to consider: If there are 5 red squares in my repeating pattern, how many blue squares would there be?

Children solve problems such as:

Rosie spent £2 on 10p and 20p stamps. She bought three times as many 10p stamps as 20p stamps. How many of each stamp did she buy?

They represent the problem using patterns of numbers, number sentences or diagrams. They recognise that for every 20p stamp Rosie buys three 10p stamps, and that one group of the stamps would cost 20p plus 10p plus 10p plus 10p = 50p. This helps them to find the solution of four 20p stamps and twelve 10p stamps, which they then check in the context of the problem.


Resource links to existing published material

Mathematical challenges for able pupils Key Stages 1 and 2

Activities

PDF 923KB

Activity 42 - Stickers

Activity 44 - More Stamps

Intervention programmes

Springboard units

None currently available

Supporting children with gaps in their mathematical understanding (Wave 3)

Wave 3 section

Pages

Is not confident when recalling X facts

1 Y4 ×/÷
DfES 1150-2005 (PDF 104KB)

Does not apply partitioning and recombining when multiplying and confuses the value of 2 digit numbers

4 Y4 ×/÷
DfES 1153-2005 (PDF 104KB)

Has difficulty interpreting a remainder as a fraction

2 Y6 ×/÷
DfES 1160-2005 (PDF 109KB)

Interprets division as sharing but not grouping

3 Y6 ×/÷
DfES 1161-2005 (PDF 94KB)

Discards the remainder: does not understand its significance

6b Y4 ×/÷
DfES 1156-2005 (PDF 93KB)

Writes a remainder that is larger than the divisor

6a Y4 ×/÷
DfES 1155-2005 (PDF 76KB)

Click here for information on different file formats and their usage.

Wave 3 addition and subtraction tracking children's learning charts

PDF 161KB RTF 930KB Word 315KB

Wave 3 multiplication and division tracking children's learning charts

PDF 195KB RTF 1.3MB Word 430KB

Wave 3 Resource sheets and index of games booklet

PDF 500KB
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