Usage of unknown
What you need to learn in this topic
- Determine the value of unknown in addition number sentences involving two numbers up to two digits with one unknown
- Determine the value of unknown in subtraction number sentences involving two numbers up to two digits with one unknown.
Quick Notes
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Practices for this topic
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Topical Test
- 1.8 Usage of Unknown - Set 1
- 1.8 Usage of Unknown - Set 2