Grade 1 maths · E.3 · Add and Subtract to 100
Add tens
Think of tens as single objects: 3 tens + 2 tens = 5 tens.
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Lia says: 70 + 20 =
Answer: 90
Eli asks: 50 + 30 =
Answer: 80
Kai asks: 20 + 80 =
Answer: 100
Tip: Think of tens as single objects: 3 tens + 2 tens = 5 tens.
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