Class 1 maths · C.7 · Addition and Subtraction to 20
Find the missing part to 20
Find the missing part. Subtraction is finding a missing addend.
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Jon says: 8 = □ + 5
Answer: 3
Ben wonders: 7 = 6 + □
Answer: 1
Dara thinks: 4 + □ = 9
Answer: 5
Tip: Find the missing part. Subtraction is finding a missing addend.
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