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Pocket money

Focus of activity: Adding two prices with a total of more than £1 using partitioning.

Working together: conceptual understanding • Show either the party bag filler page from a supermarket website, or real ‘pocket money’ priced

items costing between 50p and £1, e.g. bubbles, party poppers, sheet of stickers, mini pan pipes yo-yo, slinky, colouring pad. Ask a child to choose two items. Write down the two prices, e.g. 75p and 68p.

• Give each pair a pot of 10p and 1p coins. We are going to find the total cost. Ask children to workin pairs, one to make one price in 10p and 1p coins, and the other to make the other price in 10pand 1p coins. Ask one child to collect the 10p coins, and the other child to collect the pennies.They say how much they have, and then add their two amounts. Can they swap some pennies fora 10p coin?

• Remind children how we can use a jotting to keep track of the steps when adding numbers.

• Point out how we can find the total of 130p and 13p: 130p + 10p + 3p, = 140p + 3p. How else canwe write 143p? How would the person on the till say the total? Agree the total as £1.43. If ouranswer comes to more than 100p, we write the answer in pounds.

• Ask another child to choose two different items. Ask children to draw a jotting to find the total asabove. They then make each price using 10p coins, and combine the two amounts as above tocheck the total.

Up for a challenge? Do you think the total will be more or less than £1? Why?

Now it’s the children’s turn: • Children take it in turns to choose two items from a website page (see child instructions).

They find the total either using 10p and 1p coins, or using a jotting as above, writing the totalin pounds. They score 10 points if the total is more than £1.50.

• Go round the group and mark their additions as they do them, e.g. initially after twoexamples. Support children in using a jotting to keep track of their steps.

S-t-r-e-t-c-h: If children cope well, ask them to find the total of three items.

75p + 68p =

130p + 13p = 143p

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Things to remember Remember that when we add a pair of 2-digit numbers, we can add the 10s, add the 1s, then add these two numbers together. Often when we add the 10s, we end up with a 100! Often when we add the 1s, we end up with an extra 10! Ask children to give an example where this happened. You may want to add something that has emerged from the activity. This may refer to misconceptions or mistakes made.

Resources • The party bag filler page from a

supermarket website, or real items costing between 50p and £1, e.g. bubbles, party poppers, sheet of stickers, mini pan pipes yo-yo, slinky, colouring pad

• Pots of 10p and 1p coins• Website page of party bag fillers (see child

instructions)

Outcomes 1. Children can add pairs of 2-digit prices, using

partitioning (answer greater than £1). 2. Children can write amounts between 100p

and 200p in pounds. 3. Children begin to add three 2-digit prices.

Pocket money

Work in pairs

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Learning outcomes:• I can add pairs of 2-digit prices, using partitioning (answer greater than £1).• I can write amounts between 100p and 200p in pounds.• I am beginning to add three 2-digit prices.

Things you will need:• 10p and 1p coins• A pencil

What to do:

• Take it in turns to choose two items from the website page.

• Find the total. You can use 10p and 1p coins, or draw a jotting to help you.

• Write the total cost in pounds.

• Score 10 points if the total is more than £1.50.

S-t-r-e-t-c-h:Choose three items and find the total cost.

55p and 67p

55p + 67p =

110p + 12p = 122p£1.22

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Have fun spending your pocket money here - find a great range of toys and accessories at affordable prices.

Bubbles

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Multi-coloured bubbles55p

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Fast spin yo-yo67p

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Mini pan pipes72p

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Stretchy dog85p

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Windmill58p

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Mini pencil pack63p

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Sheriff’s badge76p

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Tiger note pad92p

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Stickers88p

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Colouring book96p

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