Starter quiz
- What is 50 + 7?
- '57' ✓
- What is 100 + 50?
- 105
- 115
- 150 ✓
- 510
-
- What is value of the 3 in the number 347?
- 3
- 30
- 300 ✓
-
- What is value of the 5 in the number 453?
- 5
- 50 ✓
- 500
-
- 200 + 200 = ______
- '400' ✓
What part is missing from the bar model?- '200' ✓
Exit quiz
- Complete the calculation. 200 + ___ = 270
- 7
- 17
- 70 ✓
- 700
-
- Which two numbers can 230 be partitioned into?
- 110 and 130
- 110 and 110
- 110 and 120 ✓
- 120 and 120
-
- Calculate the missing part. 200 + ______ + 40 = 340
- '100' ✓
What is the value of the missing part in the bar model?- '200' ✓
- Match the equations to their correct sums.
- 100 + 100 + 20 =⇔220 ✓
- 200 + 10 =⇔210 ✓
- 130 + 100 =⇔230 ✓
- 120 + 120 =⇔240 ✓
Which pair of numbers cannot be used to correctly complete the bar model?- 200 and 170
- 320 and 40 ✓
- 300 and 70
- 140 and 230
-
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Partitioning of 3-digit numbers can be represented using base ten blocks or bar models.
- 3-digit numbers can be partitioned into 2 or 3 parts in many different ways.
- Partititoning can be used to find missing parts or addends.
Common misconception
Pupils may struggle when partitioning hundreds and tens (e.g. partitioning 340 into 220 and 120).
Give pupils opportunities to manipulate base ten blocks, rearranging them and partitioning both the hundreds and the tens.
Keywords
Partition - Partition means splitting an object or value down into smaller parts.
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