1.Oblicz. a) 11+(-12)+39+9-8 b) 45+(-9)+(-91)+5 c) -4 1/2+1/6+(-1/2)+1 1/3 d) 6,25+(-1/4)+(-3/5)+0,75 e) 4/7+(-3/14)+1/14 f) 1/2+(-3/4)+(-5/8) g) 5 2/3+(-3 4/5)+1/3+(-1/5) h) 16 4/5+(-4,8)+3 1/5+(-4 1/5) bardzo prosze o poomoc !! .

a)11+(-12)+39+9-8=23-39+9-8=16+9-8=20-8=12 sory ino to znałam

11+(-12)+39+9-8=39 45+(-9)+(-91)+5=-46 -4 1/2+1/6+(-1/2)+1 1/3=-3 3/6 6,25+(-1/4)+(-3/5)+0,75= 6,25 4/7+(-3/14)+1/14=6/14 1/2+(-3/4)+(-5/8)=-7/8 5 2/3+(-3 4/5)+1/3+(-1/5)=1 13/15 16 4/5+(-4,8)+3 1/5+(-4 1/5)=11

a)=11-12+39+9-8=39 b)=45-9-91+5=-50 c)=-4½+⅙-½+1⅓=-4 3/6 + 1/6 - 3/6 + 1 2/6 = -3 3/6 = -3 ½ d)=6,25-0,25-0,6+0,75=6,15 e)=4/7 - 3/14 + 1/14 = 8/14 - 3/14 + 1/14 = 6/14 = 3/7 f)=4/8 - 6/8 - 5/8 = -7/8 g)=5 10/15 - 3 12/15 + 5/15 - 3/15 = 2 6/15 = 2 2/5 = 2,4 h)=16,8-4,8+3,2-4,2= 11