Combining and partitioning numbers within 10
I can use my knowledge of combining and partitioning numbers within 10 when solving problems.
Combining and partitioning numbers within 10
I can use my knowledge of combining and partitioning numbers within 10 when solving problems.
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Lesson details
Key learning points
- We can combine two parts to make a whole. Part + part = whole
- We can partition a whole into two parts.
- We can partition a part from a whole. Whole − part = part
Keywords
Combine - To join or merge two or more parts together.
Partition - The act of splitting an object or value into smaller parts.
Whole - All of a group or number.
Part - A piece or section of the whole.
Common misconception
Children might record that numbers can only be partitioned in one way.
Children here have the chance to explore how numbers can be partitioned in many different ways. Narrate when exploring these different ways throughout, using ___ is the whole, ___ is a part and ___ is a part.
To help you plan your year 1 maths lesson on: Combining and partitioning numbers within 10, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 1 maths lesson on: Combining and partitioning numbers within 10, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 1 maths lessons from the Solving problems in a range of contexts unit, dive into the full primary maths curriculum, or learn more about lesson planning.
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Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Complete the count for the sequence of numbers.
40
49
50
39
Q2.Match the equations that have the same sum.
4 + 2 =
40 + 20 =
7 + 3 =
70 + 30 =
Q3.Match the statement to the correct number.
16
10
15
14
Q4.Match the pairs of numbers that total 10
6
5
9
7
8
Q5.What is the double of these numbers?
8
4
10
6
Q6.Which facts can be represented by this bar model?
Assessment exit quiz
6 Questions
Q1.Look at the bar model. 3 is a part, 6 is a part, is the whole.
Q2.Partition 10 into two equal parts. Each part is
Q3.Izzy used triangles and squares to make this castle. The whole has a total of 8 shapes. What do the parts represent?
the number of triangles
the number of squares
Q4.Sofia made this picture of a fish using shapes. What numbers represent the parts and the whole?
part
whole
part
Q5.Lucas made a shape using triangles and rectangles. He used 10 shapes altogether.
If he used 4 rectangles, how many triangles did he use?
Q6.Izzy finds many ways to use triangles and rectangles to make a picture. She always uses 9 shapes. Match the number of triangles and rectangles correctly.
6 rectangles
4 rectangles
7 rectangles
5 rectangles