1. What is an abacus? |
2. How does an abacus work for subtraction? |
3. What are complementary numbers respect to 10? |
4. How do you represent numbers in the hundred's column on an abacus? |
5. Can an abacus be used for other mathematical operations? |
Abacus Lesson 28 // ADD- COMPOUND Complementary Numbers Respect to 10- ONE'S Column Video | 08:50 min |
Abacus Lesson 29 // ADD- COMPOUND Complementary Numbers Respect to 10- TEN'S Column Video | 13:00 min |
Abacus Lesson 30 // ADD- COMPOUND Complementary Numbers Respect to 10- HUNDRED'S Column Video | 09:08 min |
Abacus Lesson 31 // SUBTRACT- COMPOUND Complementary Numbers Respect to 10- ONE'S Column Video | 07:36 min |
Abacus Lesson 32 // SUBTRACT- COMPOUND Complementary Numbers Respect to 10- TEN'S Column Video | 06:29 min |
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