Published at Friday, 06 September 2019. addition worksheet. By Orlena Leroy.
The addition facts are all of the sums from 1+1 up to 9+9. It’s essential that children master these 81 sums, because they’re the foundation for the rest of elementary arithmetic.
to understand up, down, under, near, on the side, etc. (basic directions)
The best kind of abacus has each five beads in alternating colors, like the abacus from Schelling you see on the right.
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