Question

james has 2 milligrams of copper and 0.75 milligrams of nickel

Answer 1

In total, James has 2 mg + 0.75 mg = 2.75 mg of copper and nickel.

Answer 2

how much more copper does he have than nickel

Answer 3

James has 2 mg of copper and 0.75 mg of nickel. To find out how much more copper he has than nickel, we subtract the amount of nickel from the amount of copper:

2 mg - 0.75 mg = 1.25 mg

James has 1.25 mg more copper than nickel.