What is the partial product for 28x15
28 285=140 28*10=28015 280+140=320
The partial product is 420.
We can write 15 as (10+5).
It means \(28*15 =28(10+5) = (28*10) + (28*5).\)
\(28*10=280\\28*5=140\)
So, \(28*15=280+140=420\)
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