Look at the model. Explain why each tenth of the
model is 2 pounds.

This is because the total amount of pounds of oranges in the box, 20, is divided into tenths, so the problem will be 20/10, which equals 2 pounds of oranges every tenth. You can reverse check this by simply multiplying 2 by 10.

Step-by-step explanation:

If that didn't make any sense, I hope this will:

Right above the text box, it specifies that there are exactly 20 pounds of oranges in the box. Even without the 6 pound hint in the illustration above, most can easily identify that since 20 divided by 10 is 2, splitting 20 pounds of oranges into 10 *box slots evenly will result in 2 pounds of oranges in each.

*box slots are for example

Your equation is correct for consecutive even or consecutive odd numbers. For consecutive numbers, use n, n+1 as you want to very next number or one more than the n.

Thus. .. n+n+1=29
2n=29-1=28
n=28/2=14
n+1=15

Ronaldo of Brazil 15
Gerd Mueller of Germany 14