Find the missing part of an addition story
Lesson details
Learning outcome
I can find the missing part of a ‘First, then, now’ addition story.
Key learning points
- When we know two parts of a ‘First, then, now’ story, we can find the missing part.
Keywords
First - Before anything else
Then - After something in time.
Add - To find the total, or sum, by combining two or more parts (addends), or to increase an amount by adding another.
Increased - Make something larger / greater (in size or quantity).
Common misconception
Children may add the parts instead of subtracting a part to find the missing amount.
Give plenty of opportunities to act out stories and solve problems with practical objects. Encourage children to think about the size of the missing part in relation to the known parts, i.e. whether it will be larger or smaller than the other parts.
Teacher tip
Offer children additional examples to represent and solve using counters/cubes or tens frames and allow them to match stories to equations and equations to stories, justifying their choices each time.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the numbers on the bar model to what they represent.
part
whole
part
Q2.Look at this equation.
10 = 4 + 6
Which numbers are addends?
Q3.Match the number or symbol to the correct description of what it represents.
number of cold drinks
the addends combine to make the whole
number of hot drinks
Q4.What equation does this picture represent?
Q5.At the start of the story, there are 6 books on the shelf.
At the end of the story, there are 8 books on the shelf.
How many books were added?
Q6.At the start of the story, there were 9 cakes on a plate.
At the end of the story, there were 6 cakes on the plate.
How many cakes were eaten?
Assessment exit quiz
6 Questions
Q1.Which representation would match this addition story?
First, there were 2 pencils in the pot.
Then, 7 pencils were put back in.
Now, there are 9 pencils in the pot.
Q2.What is missing from this equation?
Q3.Which tens frame shows the missing 'first' part of this story?
Q4.At the start of the story, there were 6 coins.
At the end of the story, there were 8 coins.
How many coins were added to the piggy bank?
Q5.Which equation represents this story?
At the start of the story, there were 3 cookies on the plate.
At the end of the story, there were 7 cookies on the plate.
Q6.Who has solved this problem correctly?
To help you plan your 1 maths lesson on: Find the missing part of an addition story, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 1 maths lesson on: Find the missing part of an addition story, 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.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 1 maths lessons from the Additive structures: addition and subtraction unit, dive into the full primary maths curriculum, or learn more about lesson planning.