7th Grade Vocabulary - 1st Semester

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Across
  1. 1. the counting numbers; these are the first numbers learned, and they introduce positive numbers (2 words, no space)
  2. 7. a horizontal line drawn over a group of numbers in a mathematical expression to indicate they are to be operated on as a single number; it is a grouping symbol (challenge)
  3. 9. a number whose numerator is bigger than its denominator (2 words, no space)
  4. 12. multiplication in disguise
  5. 13. ab = ba; a + b = b + a (2 words, no space)
  6. 18. the top part of a fraction
  7. 21. natural numbers, their opposites, and zero; these are the numbers on the number line, and they introduce negative numbers
  8. 24. a + 0 = a, a(1) = a (2 words, no space)
  9. 25. the result of multiplying/dividing the numerator AND the denominator by the same number (2 words, no space)
  10. 28. the bottom part of a fraction
  11. 30. the result of a division expression that has a numerator of zero
  12. 31. the result of multiplication
  13. 32. numbers that are the same distance from zero, but in different directions; change the sign
  14. 34. ratios that compare two integers; they are written as fractions and include terminating and repeating decimals (2 words, no space)
  15. 36. numbers that are multiplied together to get a product
  16. 37. shortcut used to divide fractions (3 words, no spaces)
  17. 38. the distance a number is from zero; it is always positive (2 words, no space)
Down
  1. 2. the opposite of a number (2 words, no space)
  2. 3. a number that includes a whole number and a fraction (2 words, no space)
  3. 4. reciprocal (2 words, no space)
  4. 5. a shortcut used to add and subtract fractions (2 words, no space)
  5. 6. the result of a division problem
  6. 8. the bottom part of a fraction
  7. 10. when adding and subtracting fractions, the fractions must have a _____ (2 words, no space)
  8. 11. natural numbers and zero; they introduce zero (2 words, no space)
  9. 14. the top part of a fraction
  10. 15. being the same distance from zero
  11. 16. 6(2 + 1) = 12 + 6; a(b – c) = ab – bc (2 words, no space)
  12. 17. the result of multiplying 2 negative numbers
  13. 19. multiplicative inverse
  14. 20. (a + b) + c = a + (b + c); (ab)c = a(bc) (2 words, no space)
  15. 22. to reduce a fraction to its lowest terms by removing all common factors from the numerator and denominator
  16. 23. the result of multiplying a negative number and a positive number
  17. 26. the result of a division expression that has a denominator of zero (2 words, no space)
  18. 27. having the same value
  19. 29. decimals that repeat the same set of numbers
  20. 33. rate of change; it is calculated as change in y over change in x (challenge)
  21. 35. decimals that end without repeating