Parklands Junior School

Maths Workshop - 2015

Contents

Methods of calculation

Facts and general knowledge

Using and applying

My Maths

New Primary Maths Curriculum Clear expectations around written methods of

calculation in addition to mental methods.

Children are expected to know their times tables up to

12 x 12.

More requirement for children to know about fractions and decimals.

Financial skills have been reinforced i.e money skills, working with percentages.

Less reliance on calculators.

Addition

Standard method

Quick and straightforward.

Doesn't necessarily go through place value and children don't understand the values of digits.

Children forget to add on the small 1

AdditionAddition using partitioning

HTU + HTU

5 4 6 + 4 7 8

500 40 6 400 70 8

500 + 400 = 90040 + 70 = 1106 + 8 = 14

Now add all 3 numbers together:

900 + 110 + 14 = 1024

YOUR TURN!

1753 + 853 =

Addition

1753 + 853

1000

700 + 800 = 1500

50 + 50 = 100

3 + 3 = 6

1000 + 1500 + 100 + 6 = 2606

SubtractionNumber line

Used more in lower school to allow children to understand that subtraction means counting up.

Used more effectively in the context of time or money.

Sam leaves home at 7.50am and arrives to school at 8.37am. How long was his journey?

7.50 8.008.30 8.37

10mins 30mins 7mins

10mins + 30mins + 7mins = 47mins

SubtractionNumber line Kate goes to the supermarket with £50.00. She buys

some items and receives £27.25 change. How much did she spend?

SubtractionNumber line Kate goes to the supermarket with £50.00. She buys

some items and receives £27.25 change. How much did she spend?

£27.25 £28.00 £30.00 £50.00

+£0.75+£2.00

+£20.00

£20.00 + £2.00 + £0.75 = £22.75

Standard method

Subtraction

Quick and straightforward

Can be difficult when doing a problem such as: 4000 – 781. Number line would then be more appropriate

SubtractionDecomposition (expanded subtraction):

782 – 467 =

300 + 10 + 5 = 315

YOUR TURN!

2674 - 391 =

Subtraction

2674 - 391 =

2000 600 70 4

300 90 1 -

170500

2000 200 80 3

2000 + 200 + 80 + 3 = 2283

Multiplication

Standard method

Multiplication

Ladder method:

565 x 7 =

565

x7 3500

42035+

3955

(500 x 7)(60 x 7)(7x5)

Children have a better understanding of place value

MultiplicationGrid method:

When multiplying pairs of 2 digit numbers or more.

45 x 37

1200 280

150 35

40

5

30 7X

1480 185 +1665

MultiplicationGrid method:

Your turn

67 x 45

60

7

40 5X

MultiplicationGrid method:

Your turn

67 x 45

2400 300

280 35

60

7

40 5X

2700 315 +3015

Multiplication

423 X 36

Division

Standard - Short division

DivisionChunking:

Involves repeated multiplication mentally

YOUR TURN!

173 ÷ 5 =

Division

Common facts

Measuring conversions

Using and applying

Using your mathematical skills and applying them to problem solving.

Magic square;

Use the numbers 1-9 to fill in this square. Each row, column and diagonal must add up to 15.

Using and applyingIn this maze there are numbers in each of the cells. You go through

adding all the numbers that you pass. You may not go through any cell more than once.

Can you find a way through in which the numbers add to exactly 100?

Questions?

Please remember to visit our school website www.parklands.havering.sch.uk → Learning → Maths