September 2018 2 21 Report
Oblicz:

(-4) + (-3) =
(-7) + 2 =
9 + (-9)=
(-20) + 25 =
51 + (-10)=
(-75) + (-20) =
(-14) + 15 =
30 + (-20) =
(-12) + 33 =
45 + ( - 23 ) =
(-54) + (-26) =
(-36) + 27 =


to są liczby ujemne tak jak by co . !

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