Răspuns :
a) ( +7 ) + ( +2 ) + ( -5 )
=7 +2 - 5 =4
b) ( +8 ) + ( -3 ) + ( -6 ) + ( +9 )
8 - 3 - 6 + 9 = 8
c) ( + 6 ) + ( +9 ) + ( -7 )
6 +9 - 7 =8
d) ( +7 ) + ( -3 ) + ( -2 ) + ( +8 )
7 - 3 - 2 +8 =10
e) ( +45 ) + ( -54 ) + ( +37 )
=45 -54 +37=28
f) ( +58 ) + ( -79 ) + ( -15 ) + ( -19 )
58 - 79 -15 -19 =- 55
=7 +2 - 5 =4
b) ( +8 ) + ( -3 ) + ( -6 ) + ( +9 )
8 - 3 - 6 + 9 = 8
c) ( + 6 ) + ( +9 ) + ( -7 )
6 +9 - 7 =8
d) ( +7 ) + ( -3 ) + ( -2 ) + ( +8 )
7 - 3 - 2 +8 =10
e) ( +45 ) + ( -54 ) + ( +37 )
=45 -54 +37=28
f) ( +58 ) + ( -79 ) + ( -15 ) + ( -19 )
58 - 79 -15 -19 =- 55
a) (+7)+(+2)+(-5)=7+2+(-5)=9-5=4
b) (+8)+(-3)+(-6)+(+9)=8-3-6+9=5-6+9=-1+9=+8=8
c) (+6)+(+9)+(-7)=15-7=8
d)(+7)+(-3)+(-2)+(+8)=4-2+8=10
e)45-54+37=11+3748
f)58-79-15-19=19-15-19=-4-19=-23
b) (+8)+(-3)+(-6)+(+9)=8-3-6+9=5-6+9=-1+9=+8=8
c) (+6)+(+9)+(-7)=15-7=8
d)(+7)+(-3)+(-2)+(+8)=4-2+8=10
e)45-54+37=11+3748
f)58-79-15-19=19-15-19=-4-19=-23