Find the additive inverse or opposite of the number. -(7.8)?
Additive inverse just means the opposite sign. i.e. positive ---- negative So the answer would be 7.8
The additive inverse of a number is the number you add to it to get zero as your answer. For example the additive inverse of -5 is +5. So what do you think you add to -(7.8) to get zero?
I use Nice'n Clean electronic cleaning wipes.They work well and are static free and they do not have any alcohol in them. you can find them at Wal-Mart,Best Buy or K-Mart Scott
Many things! Like glasses, take a soft cloth, like a glasses cleaner, or a tissue. Then, breath on your screen until it's like a window when you breath on it, and just wipe it with the cleaner (:
Paper towel slightly damped with water always works for me. You can buy special wipes at computer stores or office supply stores but they are kinda expensive when papertowel/water works for me. Check your system type and find out what kind of screen cover it is (lexan, plastic,glass etc) and then pick up a bottle of window cleaner and read it and see if it says safe for that surface.
