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-7 3/5 -6 1/2 + 5,4= -38/5-6 1/2+5,4= -7,6-13/2+5,4= -7,6-6,5+5,4= -14,1+5,4= -8,7
-3 +7 +(-4) + (-9)=4+(-4)+(-9)=4-4+(-9)= -9
-11 + 43=32
-73 + 25= -48
67- 100= -33
-26 - 45= -71
13+(59)=72
-8-(-64)= -8+64=56
-1/5 + 4/5= -0,2+0,8=0,6 albo -1/5 + 4/5=3/5
-3 2/3 - 4= -11/3-4= -23/3= -7 2/3
-6,3 - 2,2 = -8,5
2,6 + (-10)=2,6-10= -7,4
0,2 - (-0,7)=0,2+0,7=0,9