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)