Transcript Presentation

Saving Money
LEARNING OBJECTIVE
To be able to add and subtract money to help
us save and keep track of how much money
we have.
I bought a new wig costing £3.22 and
some new false teeth which cost £5.71
How much did I spend in total?
I want to add £3.22 and £5.71
£3 . 2 2
+ £5 . 7 1
£3 . 7 9 1
The golden rule:
O The decimal points MUST
be aligned before adding
the numbers.
£3.22
+ £5.71
£8. 9 3
£5.52
- £2.34
£4.18
+ £3.75
£7. 9 3
1
£5.26
- £4.49
£2.89
+ £1.58
£4. 47
1 1
£25.11
+ £80.33
————
£31.76
+ £23.39
————
£15.59
+ £56.82
————
£37.66
+ £13.61
————
£74.82
- £59.73
————
£76.35
- £61.98
————
£74.75
- £62.27
————
£55.21
- £46.48
————
£25.11
+ £80.33
————
£105.44
£31.76
+ £23.39
————
£55.15
£15.59
+ £56.82
————
£72.41
£37.66
+ £13.61
————
£51.27
£74.82
- £59.73
————
£15.09
£76.35
- £61.98
————
£14.37
£74.75
- £62.27
————
£12.48
£55.21
- £46.48
————
£8.73
The Money Game Recording Sheet
Throw your dice and follow the instruction.
This technique
doesn’t just
work for money.
It works for any
decimal addition
as long as you
align the
decimal points.
3.57
+ 5.49
9. 0 6
1
1
2.7 0
+ 5.46
8.16
1
Sometimes it helps to
introduce a place
holder zero, so that
each number has the
same number of
DECIMAL PLACES.
5.59
+ 3.50
9.0 9
1
This place holder
zero can only ever
be put on the very
beginning or the
very end.
The golden rule:
O The decimal points MUST be aligned
before adding the numbers.
O Where necessary, add place holder
zeros to help.