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How do you break down this question 18 + 22 = 21 +

How do you break down this question 18 + 22 = 21 +
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How do you break down this question
18 + 22 = 21 +

User Tombruijn
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1 Answer

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18 plus 22 is 40 so it is equivalent to 21 plus 19
User Shohn
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