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1ねんせいの計算

なん十 の けいさん

  • 20 + 40 = 60
  • 20 + 30 = 50
  • 20 + 30 = 50
  • 40 + 20 = 60
  • 20 + 10 = 30
  • 10 + 40 = 50
  • 30 + 60 = 90
  • 40 + 60 = 100
  • 30 + 10 = 40
  • 30 + 30 = 60
  • 70 - 30 = 40
  • 80 - 60 = 20
  • 70 - 30 = 40
  • 60 - 60 = 0
  • 100 - 10 = 90
  • 70 - 60 = 10
  • 70 - 60 = 10
  • 80 - 40 = 40
  • 60 - 20 = 40
  • 80 - 40 = 40