How much is 100G silver worth?

How can you decide if the sum of two numbers is positive negative or zero without actually calculating the sum? One example is a quadratic equation that in nonstandard form contains a perfect trinomial? How many hours are there in 2430 minutes? What is 20 percent of 1800? Is the component of the processor that performs arithmetic comparison and other operation? How do you round 1256 to the nearest thousand? What is 2.20462262 rounded up? Can there be more than one median to a number? How many different combinations of pennies nickels dimes and quarters equal 35 cents? What do you call a king or authority figure who has no power and is only a face? How many tens are there in the number 5392? What is 19.95 rounded to the nearest tenth? What is the algebraic expression for weight? 6 S W M? What percent of a circle is three eighths of a circle? How many rolls of insulation do you need for 500 square feet of walls? What is the comparative form of moist? Is the radius of a circle half of a diameter? What is 120 minus 20 percent? What is the least common multiple of 8 and 346?