This knowledge comprises fluent recall of whole-number multiplication facts with 8, including through , and understanding each product as eight equal groups or an array with eight rows or columns. It includes using commutativity to connect with and recognizing related patterns, but not multiplication with larger factors, multi-digit algorithms, or generalized algebraic rules.
Multiplication by means making equal groups of . You can find the answer by skip-counting by :
These are the products for through . Also, because zero groups have zero objects.
Example: Find .
Think of groups with in each group.
Count by six times:
The sixth number is , so
You can also turn the factors around:
So, whenever you see multiplied by a number, use your facts or skip-count by .
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