Understand addition as increasing a quantity | Maths | Quizalize & Oak National Academy

Starter quiz

Tick an addition equation that could represent the counters.
- 5 + 9 = 4
- 4 + 5 = 9 ✓
- 9 - 4 = 5
Tick two subtraction equations that could represent the counters.
- 5 + 4 = 9
- 4 - 5 = 9
- 9 - 4 = 5 ✓
- 9 - 5 = 4 ✓
Izzy writes this subtraction equation to represent the bar model. 9 – 2 = ? Which addition equation could also be represented by the bar model?
- 9 - ? = 2
- 2 + 9 = ?
- 2 + ? = 9 ✓
Which set of counters could represent this story? There were 2 large teddies and 4 small teddies. How many teddies were there altogether?
Tick the two equations which could be represented by this bar model.
- 9 + 6 = 3
- 9 - 3 = 6 ✓
- 6 - 3 = 9
- 3 + 6 = 9 ✓
Which of these is not an addition story?
- I have 5 pennies in my pockets. 2 are in one. How many are in the other? ✓
- Jun has 3 pennies, Izzy has 2. How many pennies do they have altogether?
- I have 3 pennies in one pocket and 2 in the other. How many pennies altogether?

Alex writes an equation to match this story. 2 + 1 = 3 What does the 3 represent?
- The birds at the start of the story
- The birds that were added
- The birds at the end of the story ✓
Which story matches the picture?
- First, there were 2 children on the mat. Then, 3 joined. Now, there are 5. ✓
- First, there were 5 children on the mat. Then, 3 joined. Now, there are 2.
- First, there were 3 children on the mat. Then, 2 joined. Now, there are 5.
True or false. The counters shown represent this story. First, there were 4 cakes on the table. Then, my friend put 3 more cakes on the table. Now, there are 7 cakes on the table.
- True
- False ✓
Which equation matches the picture?
- 4 + 1 = 5
- 1 + 4 = 5 ✓
- 5 - 1 = 4
Which equation matches the story? First, there were 5 ducks in a pond. Then, 3 more ducks jumped in. Now, there are 8 ducks in the pond.
- 3 + 5 = 8
- 5 + 3 = 8 ✓
- 8 - 5 = 3
Laura has written this equation to match the picture. Is she correct? 5 + 3 = 8
- Correct
- Incorrect ✓

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Addition can involve increasing a quantity.
Using ‘First, then, now’ stories can be useful when representing and understanding addition as an increase in quantity.

Children may write the addends in any order when representing addition as an increase in quantity.

Present and discuss errors, focusing on what each number in an equation represents.