Respuesta :

apologiabiology
ok, so
a(b-c)=ab-ac
9 is close to 10 so

828(9)=
828(10-1)=
828(10)-828(1)=
8280-828=
7000+1280-828=
7000+452=
7452

Answer:

First, write 828 as a sum of 800 + 20 + 8. Next, multiply each number by 9. Add the products to get 7,452.

Step-by-step explanation:

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