1. What are complementary numbers with respect to 10? |
2. How do complementary numbers relate to an abacus? |
3. How can I identify complementary numbers on an abacus? |
4. Can complementary numbers be used for multiplication on an abacus? |
5. Are complementary numbers only applicable to the abacus? |
Abacus Lesson 22 // Addition -Complementary Numbers Respect to 10- ONE'S Column Video | 08:05 min |
Abacus Lesson 23 // Addition -Complementary Numbers Respect to 10- TEN'S Column Video | 11:47 min |
Abacus Lesson 25 // Subtraction-Complementary Numbers Respect to 10- ONE'S Column Video | 05:44 min |
Abacus Lesson 24 // Addition -Complementary Numbers Respect to 10- HUNDRED'S Column Video | 10:53 min |
Abacus Lesson 26 // Subtraction-Complementary Numbers Respect to 10- TEN'S Column Video | 07:45 min |
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