Zadanie 2
a)4/5 - 2/5 = 0,8 - 0,4 = 0,4
b)7/8 - 3/8 = 4/8 = 1/2
c) 12/4 - 7/4 = 5/4 = 1,25
d) 5/7- 2/7 = 3/7
e) 9/11- 4/11 = 5/11
f) 6/15- 3/15 = 3/15 = 1/5
g) 9/10 - 4/5 = 0,9 - 0,8 = 0,1
h) 7/8 - 3/4 = 7/8 - 6/8 = 1/8
i) 1/3 - 2/6 = 2/6 - 2/6 = 0
j) 2/3 - 3/4 = \frac{8 - 9}{12} = - \frac{1}{12}
k)4/5 - 1/2 - 1/2 = 0,8 - 0,5 - 0,5 = 0,3 - 0,5 = -0,2
l)
\frac{3}{8}-\frac{2}{3}-\frac{1}{2} =\frac{9-16-12}{24}=-\frac{19}{24}
ł)
\frac{22}{9}-\frac{2}{3}-\frac{1}{2}= \frac{44-12-9}{18} = \frac{23}{18} = 1\frac{5}{18}
m)
\frac{17}{12}-\frac{6}{5}-\frac{1}{4}=\frac{85 - 72-15}{60} =-\frac{2}{60}=-\frac{1}{30}
n)
\frac{11}{7} - \frac{3}{2} - \frac{2}{4} = \frac{11}{7} - \frac{3}{2} - \frac{1}{2} = \frac{22 - 21 - 7}{14} = -\frac{8}{14} = - \frac{4}{7}
o)
\frac{5}{3}-\frac{1}{2}-\frac{1}{4}=\frac{20-6-3}{12} = \frac{11}{12}
p)
3 \frac{7}{8}- \frac{23}{8} = \frac{31-23}{8}= \frac{8}{8}=1
r)
4 \frac{5}{7}-2 \frac{1}{7} = 2 \frac{4}{7}
s)
1 \frac{7}{9}- 14 \frac{4}{9} = -(14 \frac{4}{9} - 1 \frac{7}{9}) = -(13 \frac{13}{9} - 1 \frac{7}{9}) = -12 \frac{6}{9} = -12 \frac{2}{3}
5 2/3-3 1/3 = 2 i 1/3
3 3/4-1 2/4 = 2 1/4 = 2,25
8 1/5-7 4/5 = 8,2 - 7,8 = 0,4
2 \frac{1}{3}- 1 \frac{3}{4} = \frac{7}{3} - \frac{7}{4}=\frac{28-21}{12}=\frac{7}{12}
6 7/8-4 3/4 = 6,875 - 4,75 = 2,125