There are 8 pencils in a box. Aj has 15 boxes of pencils. How many pencils are altogether?
15 x 8 = ??
10 x 8 = 80
5 x 8 = 40
80 + 40 = 120
To solve this problem, I used place value partitioning. I multiplied 10 by 8 and I got 80 as the answer. Then, I multiplied 5 by 8 and I got 40 as the answer. Then I added 80 and 40 and I got 120. So AJ has 120 pencils altogether.
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