逆算の練習問題(全6問)

  1. 126 - ( □ + 15 ) = 84

  2. 72 ÷ ( □ × 3 ) = 6

  3. ( □ - 8 ) × 4 + 12 = 60

  4. ( □ - 1.2 ) ÷ 0.4 + 5 = 12

  5. 3/4 - ( □ + 1/6 ) = 1/3

  6. { ( □ + 5 ) × 4 - 6 } ÷ 2 = 15

 

 


解答一覧

  1. □ = 27

  2. □ = 4

  3. □ = 20

  4. □ = 4

  5. □ = 1/4 (0.25)

  6. □ = 4