Taken down in 2015 for quality reasons.

Problem

start color red, 70, end color red, minus, start color blue, 40, end color blue, equals, start color red, 7, space, t, e, n, s, end color red, minus
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
start color blue, t, e, n, s, end color blue
start color red, 70, end color red, minus, start color blue, 40, end color blue, equals
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
start color purple, t, e, n, s, end color purple
start color red, 70, end color red, minus, start color blue, 40, end color blue, equals
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4