Answers to March13 Homework and Review

 

 

  1. Identify the operation and model
    1. subtraction, comparison
    2. addition, continuous lengths
    3. division, sharing
  2. Identify the property
    1. Commutative +
    2. Multiplicative identity
    3. Associative x
    4. Uniqueness of sums
    5. Distributive

 

A 

B 

 

  1. above in the table marked with a and b (I apologize for the ropes; they are really hard to draw with the tool I have available.
  2. 10,123
  3.             Babylonian                                      Mayan

2 symbols                                           3 symbols

Base 60                                             base 20

No zero                                               zero

Horizontal                                           vertical

Ancient                                               ancient

     6. 

 

  

  7.  vvvvvv      <<<vvvvv

 

8.      maximum use of one symbol is 3 repeated and 4 I’s are here

There is no digit “7” in base 7.

The largest value in the one’s place in the Babylonian system is 59. This is 60.

9.      486 = 3421 5

10. 2301 5 = 326