Odpowiedź :
Zad.1
a) 7/9+4/9= 1 2/9
b) 1 2/7 + 5/7 = 2
c) 2 2/5+ 3 3/5 = 6
d) 1 - 3/5 = 2/5
e) 1 - 6/11= 5/11
f) 1 - 19/25 = 6/25
g) 4/5 + 2/5 = 1 1/5
h) 3/4 + 3/4 = 1 2/4 = 1 1/2
i) 3/4 - 1/2 = 1/4
j) 8- 1/4 = 7 3/4
k) 5 - 3/7 = 4 4/7
l) 10 - 2/5 = 9 3/5
m) 5 7/9 - 4 2/9 = 1 5/9
n) 6 - 2 7/8 = 3 1/8
o) 2 1/5 - 2/5 = 1 4/5
Zad. 2
a) 1/7 + 5/14 = 2/14 + 5/14 = 7/14 = 1/2
b) 3/4 + 5/12 = 9/12 + 5/12 = 1 2/12 = 1 1/6
c) 8/9- 5/18 = 16/18-5/18 = 11/18
d) 1/3 + 3/4 = 4/12 + 9/12 = 1 1/12
e) 3/5 - 1/2 = 6/10 - 5/10 = 1/10
f) 1 1/2 - 1/3 = 1 3/6 - 2/6 = 1 1/6
g) 1 1/2 + 3/8 = 1 4/8 + 3/8 = 1 7/8
h) 1 1/3 - 2/9 = 1 3/9 - 2/9 = 1 1/9
i) 2 3/5 - 7/10 = 2 6/10 - 7/10 = 1 9/10
j) 5/6 - 1/4 = 10/12 - 3/12 = 7/12
k) 1 1/6 - 7/9 = 1 3/18 - 14/18 = 7/18
l) 2 3/8 - 1 5/6 = 2 9/24 - 1 20/24 = 13/24
Odpowiedź:
Zad. 1
a) [tex]\frac{7}{9}+\frac{4}{9}=\frac{11}{9}=1\frac{2}{9}[/tex]
b) [tex]1\frac{2}{7}+\frac{5}{7}=2[/tex]
c) [tex]2\frac{2}{5}+3\frac{3}{5}=6[/tex]
d) [tex]1-\frac{3}{5}=\frac{2}{5}[/tex]
e) [tex]1-\frac{6}{11}=\frac{5}{11}[/tex]
f) [tex]1-\frac{19}{25}=\frac{6}{25}[/tex]
g) [tex]\frac{4}{5}+\frac{2}{5}=\frac{6}{5}=1\frac{1}{5}[/tex]
h) [tex]\frac{3}{4}+\frac{3}{4}=\frac{6}{4}=1\frac{1}{2}[/tex]
i) [tex]\frac{3}{4}-\frac{1}{2}=\frac{3}{4}-\frac{2}{4}=\frac{1}{4}[/tex]
j) [tex]8-\frac{1}{4}=7\frac{4}{4}-\frac{1}{4}=7\frac{3}{4}[/tex]
k) [tex]5-\frac{3}{7}=4\frac{4}{7}[/tex]
l) [tex]10-\frac{2}{5}=9\frac{3}{5}[/tex]
m) [tex]5\frac{7}{9}-4\frac{2}{9}=1\frac{5}{9}[/tex]
n) [tex]6-2\frac{7}{8}=3\frac{1}{8}[/tex]
o) [tex]2\frac{1}{5}-\frac{2}{5}=1\frac{6}{5}-\frac{2}{5}=1\frac{4}{5}[/tex]
Zad.2
a) [tex]\frac{1}{7}+\frac{5}{14}=\frac{2}{14}+\frac{5}{14}=\frac{7}{14}=\frac{1}{2}[/tex]
b) [tex]\frac{3}{4}+\frac{5}{12}=\frac{9}{12}+\frac{5}{12}=\frac{14}{12}=1\frac{1}{6}[/tex]
c) [tex]\frac{8}{9}-\frac{5}{18}=\frac{16}{18}-\frac{5}{18}=\frac{11}{18}[/tex]
d) [tex]\frac{1}{3}+\frac{3}{4}=\frac{4}{12}+\frac{9}{12}=\frac{13}{12}=1\frac{1}{12}[/tex]
e) [tex]\frac{2}{5}-\frac{1}{2}=\frac{4}{10}-\frac{5}{10}=-\frac{1}{10}[/tex]
f) [tex]1\frac{1}{2}-\frac{1}{3}=1\frac{3}{6}-\frac{2}{6}=1\frac{1}{6}[/tex]
g) [tex]1\frac{1}{2}+\frac{3}{8}=1\frac{4}{8}+\frac{3}{8}=1\frac{7}{8}[/tex]
h) [tex]1\frac{1}{3}-\frac{2}{9}=1\frac{3}{9}-\frac{2}{9}=1\frac{1}{9}[/tex]
i) [tex]2\frac{3}{5}-\frac{7}{10}=2\frac{6}{10}-\frac{7}{10}=1\frac{16}{10}-\frac{7}{10}=1\frac{9}{10}[/tex]
j) [tex]\frac{5}{6}-\frac{1}{4}=\frac{10}{12}-\frac{3}{12}=\frac{7}{12}[/tex]
k) [tex]1\frac{1}{6}-\frac{7}{9}=1\frac{3}{18}-\frac{14}{18}=\frac{21}{18}-\frac{14}{18}=\frac{7}{18}[/tex]
l) [tex]2\frac{3}{8}-1\frac{5}{6}=2\frac{9}{24}-1\frac{20}{24}=1\frac{33}{24}-1\frac{20}{24}=\frac{13}{24}[/tex]
Szczegółowe wyjaśnienie: