Question

ПЛИЗ!!! SOS!! РЕШИТЕ!!!!

Answer 1

1) -53+61-48+71=-101+132=31
2)3.17-5,9-0,87=3,17-6,77=-3,6
3)-0.96+(-5,37)-(-1.02)+6.3=-0.96-5.37+1.02+6,3=0.99

4)=15/7+(-4/3)-(-8/7)=15/7-4/3+8/7=41/21