正負の数と計算 基礎 解答

対象: 中1 / 符号のルール確認

  1. (+7) + (-3) = 4
  2. (-5) + (-8) = -13
  3. (-12) - (-4) = -8
  4. (+6) - (+11) = -5
  5. (-3) × (+9) = -27
  1. (-4) × (-7) = 28
  2. (+18) ÷ (-3) = -6
  3. (-24) ÷ (-6) = 4
  4. 1/2 - 3/4 = -1/4
  5. -2/3 + 5/6 = 1/6
  6. 単元解答1: (+7) + (-3) = 4
  7. 単元解答2: (-5) + (-8) = -13
  8. 単元解答3: (-12) - (-4) = -8
  9. 単元解答4: (+6) - (+11) = -5
  10. 単元解答5: (-3) × (+9) = -27
  11. 単元解答6: (-4) × (-7) = 28
  12. 単元解答7: (+18) ÷ (-3) = -6
  13. 単元解答8: (-24) ÷ (-6) = 4
  14. 単元解答9: 1/2 - 3/4 = -1/4
  15. 単元解答10: -2/3 + 5/6 = 1/6
  16. 単元解答11: (+7) + (-3) = 4
  17. 単元解答12: (-5) + (-8) = -13
  18. 単元解答13: (-12) - (-4) = -8
  19. 単元解答14: (+6) - (+11) = -5
  20. 単元解答15: (-3) × (+9) = -27

かけ算・わり算は、先に答えの符号を決めると安定します。