How much longer is half a meter than27 cm?

Which is better a 45 minute class or a 90 minute class? Vertical signs give direction or information and horizontal signs give instructions or tell you the law? What is 1113 in scientific notation? T minus 3 -11 what is t? What is the average of 26 24 31? Which is faster a mile a minute or 30 meters per second? What is the sign of 12 degrees? What is 5x2 minus 8x minus 4? Why is it important to learn about equivalent fractions? What is the top ten biggest numbers? Do all viruses have the same shape? How many seconds are there in one hour and thirty five minutes and one day? What is 32 divide by 369? Is 4 equal to 40 percent? Is the square root of 19 irrational? What are the two types of math sentences? How many syllables has the word changed? How do you know the number 11 is an odd number? What is seven less than five times the sum of a and b represented as an algebraic expression? Sample of system request summary?