Elementary Mathematics
Lesson 34
Add within Ten Plus Ten
Eight and seven
Fill the first ten
8 + 7: the first frame fills to 10, the other 5 go to the second frame: 15.
Fill the first ten
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Conceptual model: a simplified teaching picture.
Eight red beads and seven blue beads are put together.8 + 7 = ?
Fill one ten first; the beads left over are the ones.