Math Chapter 1 Vocabulary

12345678
Across
  1. 2. To replace a number with another number that tells about how much or how many.
  2. 5. Operations that undo each other; such as addition and subtraction or multiplication and division.
  3. 7. A way to write numbers by using the digits 0-9. with each digit having a place value.
  4. 8. Each group of three digits in a multi-digit number; periods are usually separated by commas or spaces.
Down
  1. 1. A way to write numbers by showing the value of each digit.
  2. 3. A way to write numbers by using words.
  3. 4. A number that is close to an exact amount.
  4. 6. The place after the ones period in the base-ten number system.