# Year 4

#### FREE maths resources for all

Year 4 Menu

### We can use a calculator to help solve one-step and two-step problems including money

##### Year 4 Unit 8

#### What we are learning:

- Calculators are very useful tools, but will only provide the correct answer to a calculation if the correct numbers are entered.
- Just one calculation i.e. What is the total of 50 and 25? is needed to solve a one-step problem.
- Two calculations – carried out in a specific order – are needed to solve a two-step calculation i.e. How much change will I get from £1 if I buy sweets costing 50p and a drink costing 25p? (Find the total for the drink and sweets and take this away from £1.)
- Children regularly misread amounts (in the context of money) on a calculator. The most common example is misreading 5.4 as £5 and 4 pence when it actually represents £5 and 40 pence as the 4 is in the column that

is 1/10 of £1, or 10pence.

##### ACTIVITY 1: SHOPPING PROBLEMS WITH A CALCULATOR

##### ACTIVITY 2: MONEY PAIRS GAME, EXPLANATION

##### ACTIVITY 3: MONEY PAIRS GAME, CHILDREN PLAYING

#### Activities you can do at home:

Cut up an old supermarket till receipt into several pieces (ideally each piece will contain 5 or 6 shopping items).

Find the total for each part till receipt using a calculator.

Now find how much change you would get from £30/£20/£40 etc.

Which part of the till receipt had the highest/lowest total?

Cut out the cards from sheet “Money pairs”. Lay the cards out in a grid face down. Player 1 turn over two cards.

If the cards have equal value keep them (and score a point) if they don’t turn them face down again. This is a good way of strengthening memory skills too! Now Player 2 turns over 2 cards … The winner is the person with the highest score at the end.

Watch out for some tricky decisions!

#### Good questions to ask:

How would I enter four pounds and sixty pence on the calculator?

How would I enter four pounds and six pence?

What is the difference in the way the calculator shows these amounts?

Which is bigger?

How do we know by looking at the calculator?

#### If your child:

Is not sure what to do first to solve a written word problem, or confuses the sequence of operations in a two step problem

Children find knowing WHAT to do to solve a problem much harder than the maths itself. This is where you can really help. Take time to talk about the problem in stages:

- Ask your child to read the problem aloud to you more than once
- Ask them what they know from the written information
- Ask them what they need to find out, e.g. describe the answer they are

seeking - This is quite a comprehension task – if they cannot understand this they will not be able to get the maths right, so take time and talk about the problem from all points of view.
- Once they fully understand what they have to do, they can start the mathematical calculation.

##### Extension Activity

Please use this activity when you think your child understands the unit of work. It will deepen and extend your child’s understanding of this unit.