proszę na jutro daje 20 punktów ​



Proszę Na Jutro Daje 20 Punktów class=

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: