S UB TRACT I O N
SSUUB
B TTRRAA C T II OONN
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Cliffe VC Primary School Calcula on Policy
Cliffe VC Primary School Calcula on Policy
Ye a r 3
Subtract with 2 and 3-digit numbers
Ye a r 3
Year 3 Subtract
withwith
2 and23-digit
numbers numbers
Subtract on an empty number line
Subtract
and 3-digit
(ENL) by counting
Subtract
on an onempty number line (ENL) by counting on
Subtract
on an empty number
line (ENL) by counting on
Cliffe VC Primary School Calcula
on Policy
Ye a r 3
Jump on to
Jump on to
Subtract
with
2 and 3-digit numbers
next ten
first
next ten first
Subtract on an empty number line (ENL) by counting on
Children
should
understand
to back
count
backappropriate,
where appropriate
Children
should
understand
when when
to count
where
Jump
on to should understand when to count back where appropriate, using place
Children
using
place
value
or number
This
skill be
should
be reinforced
using
place
value
or number
facts.facts.
This skill
should
reinforced
value
or number facts. This skill should be reinforced through mental work.
next ten first
through
mental
work.
through
mental
work.
Begin to use formal column subtraction method, first using ‘friendly numbers’’.
Begin
to to
useuse
formal
column
subtraction
method,
first using
Begin
formal
column
subtraction
method,
first using
Children‘friendly
should understand
when
to
count
back
where
appropriate,
numbers’‛.
‘friendly numbers’‛.
Move
totoformal
Move
formalsubtracsubtrac-
to formal subtracusing place value or number
facts. This skill shouldMove
be reinforced
Friendly numbers, no tion
using‘take
‘takeand
and make’‛.
tion
using
Friendly numbers, no exchange necessary.
tion
using
‘take and make
make’’.
through mental work.
exchange necessary.
Begin to use formal column subtraction method, first using
‘friendly numbers’‛.
Teach the children to consider
Friendly numbers, no exchange necessary.
the
most appropriate
method
Teach
the children
to consider
Move to formal subtraction using ‘take and make’‛.
the most appropriate method
Ke y voca bula r y equal to, take, take-away, less, minus, subtract, leaves, distance between, how many more, how many fewer/less than, most, least count
the children
to con-take-away, less, minus, subtract, leaves, disKe y voca
bulaTeach
rleft,
y equal
take,
back,
how many
how to,
much
less is…, difference, count on, strategy, partiTeach the children
to
consider
sider the most appropriate
tance
between,
how
many
more,
how many
than, most, least count
tion,
tens
units,method
take
and
make,
exchange,
digit, fewer/less
value, hundreds
the most appropriate
method
back, how many left, how much less is…, difference, count on, strategy, parti
Ke
y S tens
kills funits,
or sub take
t r ac t ion
t Ye a r exchange,
3
tion,
anda make,
digit, value, hundreds
Understand place value in 3-digit numbers; add and subtract 1s, 10s or
without
use this less,
to addminus,
and subtract
multiples
of dis1, 10,
Ke y voca bula 100s
r y equal
to, difficulty;
take, take-away,
subtract,
leaves,
Ke y S kills f or sub t r ac t ion a t Ye a r 3
100how
to/from
tance between,
many3-digit
more,numbers.
how many fewer/less than, most, least count
Understand
place
value
in 23-digit
numbers;
and
1s, 10s or
Mentally
subtract
any
pairis…,
of
digit numbers,
e.g.add
75
58 subtract
back, how many left, how much less
difference,
count
on,–strategy,
parti100s without
difficulty;
this
add andsubtractions,
subtract multiples
Recognise
that there
are twouse
ways
of to
completing
either byof 1, 10,
tion,
tens
units,
take
and
make,
exchange,
digit,
value,
hundreds
Key vocabulary equal to,
take,to/from
take-away,
less,
minus,or
subtract,
leaves, back,
dis- tance
many more,
100
3-digit
numbers.
counting
up (using
ENL)
by counting
e.g.between,
54 – 3how
(counting
up)how many
fewer/less than, most, least count back, how many left, how much less is..., difference, count on, strategy, parti- tion,
Subtract
using
number
bonds,
eg.75
347-5,
Mentallymentally
subtract
anyplace
pairvalue
of 2 and
digit
numbers,
e.g.
– 58347tensKe
units,
and fmake,
exchange,
digit,
value,
hundreds
y Stake
kills
or40,sub
t
r
ac
t
ion
a
t
Ye
a
r
3
347-100)that there are two ways of completing subtractions, either by
Recognise
!
Understand place value in 3-digit numbers; add and subtract 1s, 10s or
Key Skills for subtraction
at Year 3
counting
up (using ENL) or by counting back, e.g. 54 – 3 (counting up)
September 2014
place
value in 3-digit
numbers; use
add and
subtract
1s, 10s
or subtract
100s without multiples
difficulty; useof
this
add and
100s
without
difficulty;
this
to add
and
1,to10,
• Understand
Subtract
mentally
using
place
value
and
number
bonds,
eg.
347-5, 347subtract multiples of 1, 10, 100 to/from 3-digit numbers.
100 to/from 3-digit numbers.
347-100)
pair of
2 digit numbers, e.g. 75 – 58
• Mentally subtract any 40,
Mentally
subtract
pair ofsubtractions,
2 digit numbers,
of completing
either by e.g. 75 – 58
• Recognise that there are two ways any
countingRecognise
up (using ENL)that
or by counting
– 3 (counting
up)
there back,
are e.g.
two54ways
of completing
subtractions, either by September 2
Subtract
mentally
using
place
value
and
number
bonds,
eg.
347-5,
347
•
counting up (using ENL) or by counting back, e.g. 54 – 3 (counting up)
40, 347-100)
!
Subtract mentally using place value and number bonds, eg. 347-5, 34740, 347-100)
September 2014