New
New
Use place value knowledge to write addition and subtraction equations
I can use place value knowledge to write addition and subtraction equations.
Lesson 7 of 10
New
New
- Year 3
Use place value knowledge to write addition and subtraction equations
I can use place value knowledge to write addition and subtraction equations.
Lesson details
Key learning points
- The language of unitising helps us to use number facts to add and subtract multiples of 10.
- The language of unitising helps us to use number facts to add and subtract multiples of 100.
- Place value equipment supports explanation of the addition and subtraction equations.
Keywords
Part - A piece or section of the whole.
Whole - All of a group or number.
Bar model - A way to represent a problem involving parts and whole.
Common misconception
Identifying the parts and wholes in a problem or given context.
Use the stem sentences and representations of part-part-whole and bar models to support pupils in identifying the parts and whole.
Make use of manipulatives such as base ten equipment or counters to support the recording of the parts and wholes in stem sentences, bar and part-part-whole models before recording using equations.
Teacher tip
Licence
This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Express this representation as a number of tens. tens
Express this representation as a number of tens. tens
Q2.Match the number of tens to the correct 3-digit number.
Match the number of tens to the correct 3-digit number.
Q3.160 = 100 + .
160 = 100 + .
Q4.Which equation would make this statement correct? 140 <
Which equation would make this statement correct? 140 <
100 and 2 tens
100 and 1 ten
Q5.What number is missing from the bar model?
What number is missing from the bar model?
Q6.Sort the values from largest to smallest.
Sort the values from largest to smallest.
Assessment exit quiz
6 Questions
Q1.Complete the sentence. Part + part = .
Complete the sentence. Part + part = .
Q2.In a bar model, to find the whole we add the .
In a bar model, to find the whole we add the .
Q3.Match the numbers and representations.
Match the numbers and representations.
Q4.Use this bar model. Which subtraction calculations are correct?
Use this bar model. Which subtraction calculations are correct?
100 - 70 = 170
70 - 100 = 170
Q5.How can you calculate the missing part?
How can you calculate the missing part?
100 + 150
100 - 150
Q6.Sophie rolled a ball that rolled for 100 centimetres. Jacob's ball rolled 40 centimetres further. How many centimetres did Jacob's ball roll? cm.
Sophie rolled a ball that rolled for 100 centimetres. Jacob's ball rolled 40 centimetres further. How many centimetres did Jacob's ball roll? cm.
