a)11+(-12)=39+9-8 b)45+(-9)+(-91)+5 c)4½+0,6+(-½)+1⅓ d)6,25+(-¼)+(3piąte)+0,75 e)4siudme+(-3czternaste)+1czternasta f)½+(-3czwarte)+(-5ósmych) g)5⅔+(-3i4piąte)+⅓+(-⅕) h)16icztery piąte+(-4,8)+3⅕+(-⅕)

a)11+(-12)+39+9-8 = 1 b)45+(-9)+(-91)+5 = -50 c)4½+0,6+(-½)+1⅓ = 4,6+1⅓ = 46/10+4/3 = 138/30+40/30 = 178/30 = 5 28/30 = 5 14/15 d)6,25+(-¼)+(3/5)+0,75 = 7,35 e)4/7+(-3/14)+1/14 = 8/14-3/14+1/14 = 6/14 = 3/7 f)½+(-3/4)+(-5/8) = 4/8-6/8-5/8 = -7/8 g)5⅔+(-3 4/5)+⅓+(-1/5) = 5⅔-3 4/5+⅓-1/5 = 6-4 = 2 h)16 4/5+(-4,8)+3 1/5+(-1/5) = 16 4/5-4,8+3 1/5-1/5 = 19 4/5-4,8 = 19,8-4,8 = 15