Oblicz: (-12)+(-8)-(+7)-(-9)=
8-(-9)+(-11)-(+5)=
(-21)+(-7)-(+15)-(-32)=
-(-13)+(-2)-(+16)+(-5)=
proszę o dokładne oblicznia :)
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(-12)+(-8)-(+7)-(-9)= -20 - 7 - (-9) = -27 (dwa minusy dają plus) + 9 = -18
8-(-9)+(-11)-(+5)= 17 - 11 - 5 = 6 - 5 = 1
(-21)+(-7)-(+15)-(-32)= -28 - 15 + 32 = -43 + 32 = -11
-(-13)+(-2)-(+16)+(-5)= 13 - 2 - 16 - 5 = -15 - 16 - 5 = -31 - 5 = -36