New
New
Year 2
Partition 2-digit numbers in different ways
I can partition two-digit numbers in a range of ways.
New
New
Year 2
Partition 2-digit numbers in different ways
I can partition two-digit numbers in a range of ways.
Lesson details
Key learning points
- Two-digit numbers can be partitioned into two or more parts.
- Known facts can be used to help partition a two-digit number into a multiple of ten and another part.
- The patterns in the tens can help to predict new equations.
- Known facts can be used to help partition both the tens and the ones in a two-digit number.
Common misconception
Children may think two-digit numbers can only be partitioned into tens and ones.
Use practical equipment to manipulate tens and ones on part-part-whole models to help children to understand the many ways that a number can be partitioned.
Keywords
Partition - To split a whole up into parts.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
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6 Questions
Q1.
79 − 40 = ? How many tens is being subtracted from 79 in this equation? tens
Q2.
Look at the image. Which equation does it represent?
82 − 40 =
82 − 20 =
Q3.
Match the known facts that will help to subtract multiples of 10
7 tens − 3 tens = 4 tens
60 − 40 = 20
80 − 50 = 30
Q4.
What could we do to help solve this equation? 72 − 40 =
Subtract 2 tens from 7 tens
Subtract 7 tens from 4 tens
Q5.
Which of these equations will have the same sum as 37 + 50?
73 + 50 =
Q6.
71 − 50 =
Exit quiz
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6 Questions
Q1.
Match each number to the number of tens it is composed of.
4 tens
7 tens
5 tens
8 tens
6 tens
Q2.
52 can be partitioned in different ways. Match the multiple of 10 with another number that sums to 52
2
12
22
32
42
Q3.
Which equation will come next in the pattern?
56 = 10 + 46
56 = 46 + 10
Q4.
Which of these equations show that 63 has been correctly partitioned into three parts?
63 = 20 + 30 + 3
Q5.
Which of these equations show that 47 has been correctly partitioned into three parts?
47 = 40 + 4 + 7
Q6.
What is the missing addend in this equation? 69 = 40 + 9 +
Additional material
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