Quote:
Originally Posted by pj67coll
Seems to be massively lengthening what should be a pretty simple two column addition to me.
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It is really the same thing. One is a more mechanical, the other makes you think in ones and tens, and eventual hundreds and thousandths.
Anyway I recommend trying different things, such as the Grapes of Math set of books by Greg Tang.
The Grapes Of Math - Free Shipping