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Abacus Lesson 11: Addition Practice by Johnny Keovilay is a document available to read on EtoBox.

What is Abacus Lesson 11: Addition Practice about?

This math lesson document provides 5 simple addition problems using complementary numbers in the hundreds column to be solved using an abacus. Students are instructed to work through each addition problem using the abacus beads and correct finger positions, even if they can solve the problems mentally.

Author

Johnny Keovilay

Language

EN