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I mean how the fuck else (lemmy.world)

submitted 2 days ago by Stamets@lemmy.world to c/adhd@lemmy.dbzer0.com

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[-] gandalf_der_12te@discuss.tchncs.de 8 points 1 day ago* (last edited 1 day ago)

i actually do do this. also sometimes 7 + 6 = 7 + (3 + 3) = (7 + 3) + 3 = 10 + 3 = 13!

btw: i studied math.

[-] Sludgeyy@lemmy.world 1 points 17 hours ago

This is part of common core math

Making Tens (and Hundreds): Composing and decomposing: Students learn to break down numbers to make friendly numbers like 10 or 100, which are easier to add. Example: To add 8 + 5, they might see that 8 needs 2 to make 10. They could take 2 from the 5, leaving 3. Then, they add 8 + 2 = 10, and 10 + 3 = 13.

They are teaching new students this