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  • Solve using BT or EF: 27-19=?
    8
  • Solve using NL: 50-9=?
    41
  • Solve using BT or EF: 76-36=?
    40
  • Solve using BT or EF: 82-25=?
    57
  • Solve using Bt or EF: 36-14=?
    12
  • Solve using EF: 46-36=?
    10
  • Solve using BT: 30-15=?
    15
  • Solve using BT: 96-58=?
    38
  • Solve using NL: 42-7=?
    35
  • Solve using EF: 54-29=?
    25
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