obliczy mi ktoś 1,3i 4 zadnia pilnie daje naj!!

zad 1 a)12-7=12+(-7) b)-4-8=-4+(-8) c)-5-(-9)=-5+9 d)23-(-32)=23+32 e)(-12)-8=-12+(-8) f)(-24)-(-16)=-24+16 zad3 a)7+(-9)=7-9=-2 b)(-4)-(-4)=-4+4=0 c)-4+(-3)=-4-3=-7 d)(-12)+(-18)=-12-18=-30 e)-(-7)-(-7)=7+7=14 f)(-31)-(-9)=-31+9=-22 g)-8-(-(-2))=-8-2=-10 h)4-(-5)+(-8)=4+5-8=1 i)5+(-4)+(-1)=5-4-1=0 zad4 a)5+(-4)=5-4=1 b)6-(-7)=6+7=13 c)-21+(-4)=-21-4=-25 d)-10-(-20)=-10+20=10 e)-12+8=-4 f)3-24=-21 g)-37+48=11 h)15+(-27)=15-27=-12 i)-9+(-42)=-9-42=-51