do róznicy liczby -0,64 i liczby -2,8 dodaj róznicę liczby - 8,6 i liczby 0,4
-0,64-(-2,8)=2,16
-8,6-0,4=-9
2,16+(-9)=-6,84
(-0,64-(-2,8))+(-8,6-0,4)=2.16+(-9)=-6,84
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-0,64-(-2,8)=2,16
-8,6-0,4=-9
2,16+(-9)=-6,84
(-0,64-(-2,8))+(-8,6-0,4)=2.16+(-9)=-6,84