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SỐ NGUYÊN - Coggle Diagram

- - - - VD: 2-5 = 2+ (-5) = -3
  - - - VD: (-2) + (-5) = -(2+5) = -7
    - - VD: 15 + (-20) = - (20-15) = -5
    - - a + b = b + a;
        (a + b) + c = a + (b + c)
  - - - VD: (-2) . (-5) = 2.5 =10
    - - VD: 2. (-5) = (-2).5 = -(2.5) = 10
    - - a.b = b.a
        (a.b).c = a.(b.c)
        a.(b + c) = a.b + a.c