Cambridge International Catalogue 2024 - Final - Flipbook - Page 17
CAMBRIDGE PRIMARY MATHEMATICS
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9
Unit 9 Numbers to 20
Numbers to 20
Practise
Ten and ones – making numbers
Explore
Will the counters fill the ten frame?
First estimate. Then count to check.
Maths word
count
2 How many in each group? First estimate. Then count to check.
a
There are
circles.
b
There are
triangles.
There are
stars.
c
Try this
Learn
Look inside
How many counters in a full ten frame? Will you estimate or count?
Point to the full ten frame.
Unit 9 Numbers to 20
Viti has made the number 15.
She has 1 tower of 10 ones
and 1 tower of 5 ones.
Make a tower of 10 cubes and
a tower of 7 cubes.
What number have you made?
Make other numbers using
a 10 and some ones.
Ten and ones – breaking up numbers
Unit 9 Numbers to 20
Learn
3 Break up these numbers
into 1 ten and ones.
Let’s talk
We can break up 16 into 1 ten
and 6 ones.
Do you agree with Annay or Jack?
Explore
Practise
The children in this group break up into 2 parts.
1 a Place 13 counters in ten frames like these.
View sample material
from Cambridge
Primary Mathematics
a must
No. 10
be first.
14
whole
16I =made
10 + 14.
6
10
4
b
10
17
6
b Now use 19 counters.
?
4
?
5
part
c
part
Practise
11
?
1 Use cubes to break up the
number into ten and ones.
a
b
d
?
?
10
?
c
e
?
3
?
d
10
?
What is the whole number?
What are the numbers in each part?
Maths words
break up
part
?
?
?
2 Draw a picture to show 15
broken up into ten and ones.
6
f
9
?
10
2
7
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