Starter quiz
- What is 15 + 10 = ______
- '25' ✓
- What is 400 + 100 = ___
- 401
- 410
- 500 ✓
- 600
-
- What is 5 + 3 + 5 = ______
- '13' ✓
- What is 60 + 60 = ______
- '120' ✓
- What is the missing number: 47 + 3 = ___
- 40
- 49
- 50 ✓
- 51
-
- Which calculation gives the largest total?
- 13 + 6 = ✓
- 15 + 3 =
- 16 + 1 =
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Exit quiz
- What is the sum of 40 and 50?
- '90' ✓
- What are the addends in this equation: 130 + 80 = 210
- 210
- 130 ✓
- 80 ✓
-
Which equations are represented by the bar model?- 40 + 30 = 70 ✓
- 70 = 30 + 40 ✓
- 30 + 70 = 110
- 70 = 30 + 40 ✓
-
Look at the bar model. What is the missing sum?- '45' ✓
Which pairs of addends could complete the bar model?- 9 and 14
- 11 and 13 ✓
- 12 and 12 ✓
- 15 and 10
-
Which pairs of addends could complete the bar model?- 60 and 120
- 80 and 110 ✓
- 90 and 90
- 95 and 95 ✓
-
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Equations can be represented using part-part-whole or bar models.
- The sum is the whole and the addends are parts.
- Equations can be written starting with the addends or with the sum.
Common misconception
Pupils may struggle starting equations with the sum. They may think = means 'the answer is..'
Ensure that children understand that 'equals' means that the equation balances (i.e. both sides have the same value.) This could be achieved through using balance scales and attaching the idea of equals with balance.
Keywords
Addend - An addend is a number added to another.
Sum - The the total when numbers are added together.
Equation - An equation shows that one number or calculation is equal to another.
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