Did you mean "What do you add to 4.18 to make 8?" If so, the answer is 3.82. If you meant 4/18, then the answer would be 7 and 14/18.
You add 8 - 43/8= 35/8
Add
you can add - 4+8+6=18, that leaves 30+100+40=170 then 170+18=188
make the 1/4 into 2/8 Answer: 8 and 5/8
20
2x9+4+2. When you multiply 2 and 9 you get 18. Then when you add 4 you get 22. When you add 2 you end up with 24.
6 - 4 1/8 = 1 7/8
8 x 9 = 72 18 x 4 = 72
4 and 3/8
-28
6 + 8=14, 14+4=18, 18/2=9
You need to add 18 to negative 8 to get 10.