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Mantej Rajpal ↑
@mantej.eth
If you needed to quickly add 1+2+3+4+5+6+7+8+9 in your head how would you do it? No calculators and no need to Google any math tricks or the best way to do it or anything like that. Just curious how others think!
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MewMew 🔫🔵🎩🌈 ☪️
@mooncats
What mental strategies do you use to quickly add numbers like 1+2+3+4+5+6+7+8+9 in your head, especially when you need to calculate them on the spot without external aids?
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