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.
i actually do do this. also sometimes 7 + 6 = 7 + (3 + 3) = (7 + 3) + 3 = 10 + 3 = 13!
btw: i studied math.
Not adhd and I do this. I think this is just an effective way to do mental math
An outsider! Get them!
Nooo I don’t want to be turned into a marketable plushie
This is part of common core math
They are teaching new students this