1 way
.........................................................................................................
2 way
share writing
900
-----------------
4500 : 5
- 45
----------
-- 0
0
-----
0
0
-----
....................................
3 way
4500 = 4000 + 500
we share thousands (4 * 1000)
4000 : 5 = 800
we divide hundreds ( 5 * 100)
500 : 5 = 100
add quotients
800 + 100 = 900