Download Stalbridge Primary School KS2 Maths Multiplication

Stalbridge Primary School
Year
3
KS2 Maths
Multiplication
Vocabulary: Lots of, groups of, sets of, times, jump up, repeated addition, product, factors.
The children will need a
knowledge of factors and their
times tables.
Number line:
Example Questions:
(one step problem) I see a t-shirt
in a shop for £5, how much will it
cost if I buy 3 of them?
5x3
(two step problem) I buy these
three t-shirts every month for
six months, how much will it cost
me?
Five jumps, each is two steps. 5 × 2 = 10.
ARRAY: 12 (factors)
12 x 1
(5x3) x6
6x2
3x4
Stalbridge Primary School
Year
4
Children will be adapting their
addition knowledge to their
multiplication methods in year
four.
Multiplication is viewed as the
natural extension to addition.
i.e. 3x4
3 lots of four
4+4+4
KS2 Maths
Vocabulary: Breaking down, tens and ones, Place value, repeated addition
Partitioning:
32 X 9
30

2
Two – step problem:
X9
Many of the methods involve twostep problems, one of the steps
being addition.
Multiplication
270 + 18 = 288
breaking down and
then applying
addition.
32 x 9
The children will need to use
their knowledge and
understanding of carrying.
The children will develop onto
multiplying in a column method
and gradually move away from
breaking down numbers.
In year five, children are
encouraged to estimate their
answers first, be using their
knowledge of rounding and
multiplication.
30 x 9 = 270 +
Progression
(30+2) x 9
2 x 9 = 18
288
Distributive Law:
helps us to answer multiplication
questions by breaking down
large numbers into smaller
numbers.
Stalbridge Primary School
Year
5
To introduce the multiplication of
two-digit numbers by two-digit
numbers, the children will initially
refer back to the grid methods
from year four. This can then be
developed onto the column
method, which incorporates
addition.
Children will again be able to
break down numbers into tens and
ones and then use their addition
knowledge in this two-step
problem.
KS2 Maths
Multiplication
Vocabulary: Carrying, estimate, rounding, place value,
Grid Methods:
23 x 8 =
The children will need an understanding of place value.
Progression to TU x TU
23 x 28 =
400 + 60 = 460
160 + 24 = 184
Total: 644
Two – step problem:
breaking down and then
applying addition.
38
Expanded Short Multiplication:
38 x 7
7 x
266
5
(7 x 8) carry the 5 tens
(7 x 3 tens + the carried 5 tens)
Stalbridge Primary School
Year
6
In year 6, children are still
encouraged to estimate their
answers first, be using their
knowledge of rounding and then
multiplication.
They need to be introduced to
the new vocabulary of ‘integer’
meaning a number.
The children will need an
understanding of place value and
how the tenths and hundredths
relate to the hundreds, tens and
ones.
They can make the decimal
numbers into whole integers by
using their knowledge of place
value.
KS2 Maths
Multiplication
Vocabulary: Integer, estimate, pace value, tenths, hundredths,
Multiplying 2 digit numbers by 2 digit numbers:
56 x 27
Estimate: 60 x 30 = 1800
x
The two steps are; multiplication
56 x 27
20
7
50
1000
350
6
120
42
and then adding the carried
56
1350
27
162
42
1512
1
progression
number.
x
(7 x 6)
350
(7 x 50)
120
(20 x 6)
1000
(20 x 50)
1 512
1
Carry the one
ten.
Stalbridge Primary School
Progression to Year 7
KS2 Maths
Multiplication
Multiplying 3 digit numbers by 3 digit numbers:
356
356 X 237
progression
300
50
237 x
6
42 (7 x 6)
200
30
7
60,000
10,000
1200
71200
9000
1500
180
10680
2100
350
42
2492
84372
11
350 (7 x 50)
2100 (7 x 300)
180 (30 x 6)
1500 (30 x 50)
9000 (30 x 300)
1200 (200 x 6)
10 000 (200 x 50)
60 000 (200 x 300)
84 372
1 1