Benchmark 9A: The Mathematical World - Numbers
(grades 3-5, page 212)
  • The meaning of numerals in many-digit numbers depends on their positions. (1 of 4)
  • In some situations, "0" means none of something, but in others it may be just a label of some point on a scale. (2 of 4)
  • When people care about what is being counted or measured, it is important for them to say what the units are (three degrees Fahrenheit is different from three centimeters, three miles from three miles per hour). (3 of 4)
  • Measurements are always likely to give slightly different numbers, even if what is being measured stays the same. (4 of 4)