Respuesta :

28           28*5=140
*             28*10=280
15                     

280+140=320



The partial product is 420.

We can write 15 as (10+5).

It means [tex]28*15 =28(10+5) = (28*10) + (28*5).[/tex]

[tex]28*10=280\\28*5=140[/tex]

So, [tex]28*15=280+140=420[/tex]

The partial product is 420.

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