помогите решить:
1) -3+(-5)+(-7)+2
2) 17+(-2)+(-9)+5+(-7)+9
3)-0.5+4+(-3.24)+(-6.1)+0.91
4)0.28+(-0.96)+(-0.14)+0.3+(-0.9)
1) -3+(-5)+(-7)+2
2) 17+(-2)+(-9)+5+(-7)+9
3)-0.5+4+(-3.24)+(-6.1)+0.91
4)0.28+(-0.96)+(-0.14)+0.3+(-0.9)
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2)13
3)−4,93
4)−1,42
2)17+(-2)+(-9)+5+(-7)+9=17-2-9+5-7+9=13
3)-0.5+4+(-3.24)+(-6.1)+0.91=-0.5+4-3.24-6.1+0.91=-4.93
4)0.28+(-0.96)+(-0.14)+0.3+(-0.9)=0.28-0.96-0.14+0.3-0.9=-1.42