Question

I'm trying to help my sister with her 4th grade work but i'm not sure if i remember this type of work

Answer 1

$84\times7$

Let's complete the boxes.

We split 84 into 80 + 4.

$84\times7=(80+4)\times7$

We multiplied 7 to the numbers inside the parenthesis.

$84\times7=80\times7+4\times7$

Following EPMDAS, we do the multiplication part first.

$84\times7=560+28$

Then, add.

$84\times7=588$