sums of three addends
1ª Edition
Copyright notice: By Luis Galindo Martín. All rights reserved.
The above information forms this copyright notice: © 2023 by Luis Galindo Martín. All rights reserved.
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24 + 24 sums of three addends
To learn by doing
Exercises with marking of the units we take with us facilitate the student to carry out and to the teacher the correction.