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Learning Math Home
Number and Operations Session 5: Notes
 
Session 5 Part A Part B Part C Homework
 
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Notes for Session5, Part A


Note 1

Doing Alpha math is like decoding a cipher -- it helps the solver think about how different number/letter combinations relate to one another. For example, ab + b = cdd suggests that a must be 9, because no other digit in the tens place would give a three-digit sum. The most that could be added to 9 in the tens column is 1, because two one-digit numbers cannot add to more than 18. That means that d must be 0. Since the sum has equal ones and tens digits, b must be 5. This type of reasoning is an important step toward a deep understanding of the operations involved in the Alpha math problems.

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