How i can do 7 ÷ 287 i need right now because this is homework

Use the bus stop method.

this is the bus stop method.
(see image)

what you have to do is imagine the number individually.

so           _______
             7 [2 8 7

do 2/7 first. as you can see, 2/7 does not work, so write zero and carry on the two in the next question.

               0______
             7 [2 (2)8 7

now the number is 28.

so you do 28/7, which is 4.

write four on top next to the zero:

                0_4___
             7 [2 (2)8 7

next is 7.

7/7= 1

so write one on top of your 'bus stop'

                0_4__1
             7 [2 (2)8 7

this makes 041 which is 41.

( by the way, / just means divide as I don't have a division symbol)

Hope it helps!

(use this method for the rest of the questions)

9/12 is the answer because 3/4 times 3 each is 9/12