Math
posted by Lori on .
What multiplication fact can be found by using the arrays for 2x9 and 5x9?

Multiplication facts:
2 x 9 means two rows times 9 columns.
Facts:
2 x 9 = 18
18/2 = 9
18/9 = 2
9 x 2 = 18
Do the same with the other other numbers.
Also, note that 2 and 9 are factors of 18 and 18 itself is the product of 2 and 9. 
what mutiplication fact can be found by using the arrays for 2x9 and 5x9

7 x 9

number sence what multiplication fact can be found by using the arrays for 2*9 and 5*9

The answer is "7x9".
Because the array of 2x9:
•••••••••
•••••••••
And the array of 5x9:
•••••••••
•••••••••
•••••••••
•••••••••
•••••••••
When added together or in the verbiage of the question "can be found by using the arrays".
You have 7 rows of 9. Or "7x9" 
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What mulitiplication fact can be found by using the arrys 2times9 and5times9