Proszę o pomoc proszę!!!!!!!!!!!Matama;( oblicz;1 5/8 -2 11/14b.3 7/12 -1 3/5- 1 11/20+5/6c.3 7/12-1.... Question from @Marta90789

Marta90789 @Marta90789

October 2018 1 19 Report

Proszę o pomoc proszę!!!!!!!!!!!

Matama;(

oblicz;

1 5/8 -2 11/14

b.3 7/12 -1 3/5- 1 11/20+5/6

c.3 7/12-1 3/5-1 11/20 +5/6

d.8/15*25/12

e.2 1/16*2 2/11

f.22/13:121/52

g.15/18:10/21

h.-44/35*(-7/8)

i.10/19:(-15/38)

j.(1 3/4-11/20)*(2 1/2 -1 7/18)

zad2

a.(4,2-3,8)*5,1

b.1,75*(4,12-3,82)

c.(o,75-0,26)*(2,16-1,84 )

d.(3/4)-(1 1/4)

e.(1/2-2/5)*2 6/7

BŁAGAM!!!!!!!

ag94

a) $\frac{5}{8} -2 \frac{11}{14}=\frac{5*14}{8*14} -2 \frac{11*8}{14*8}=\frac{70}{112} -2 \frac{88}{112}=-2\frac{18}{112}=-2\frac{9}{56}$

b) $3 \frac{7}{12} -1 \frac{3}{5}- 1 \frac{11}{20}+\frac{5}{6}=\\ \\ =3\frac{35}{60}-1\frac{36}{60}-\frac{33}{60}+\frac{50}{60}=\\ \\ =3\frac{35}{60}+\frac{50}{60}+(-1\frac{36}{60})+(-\frac{33}{60})=\\ \\ =3\frac{85}{60}+(-1\frac{69}{60})=\\ \\ =3\frac{85}{60}-1\frac{69}{60}=\\ \\ =2\frac{16}{60}=2\frac{4}{15}$

c) $3 \frac{7}{12} -1 \frac{3}{5}- 1 \frac{11}{20}+\frac{5}{6}=\\ \\ =3\frac{35}{60}-1\frac{36}{60}-\frac{33}{60}+\frac{50}{60}=\\ \\ =3\frac{35}{60}+\frac{50}{60}+(-1\frac{36}{60})+(-\frac{33}{60})=\\ \\ =3\frac{85}{60}+(-1\frac{69}{60})=\\ \\ =3\frac{85}{60}-1\frac{69}{60}=\\ \\ =2\frac{16}{60}=2\frac{4}{15}$ ten sam przykład co b ;)

d) $\frac{8}{15}*\frac{25}{12}=[skracam\ na \ skos ]\\ \\ =\frac{2}{3}*\frac{5}{3}=\frac{10}{9}=1\frac{1}{9}$

e) $2 \frac{1}{16}*2 \frac{2}{11}=\frac{33}{16}*\frac{24}{11}=\frac{3}{2}*\frac{3}{1}=\frac{9}{2}=4\frac{1}{2}$

f) $\frac{22}{13}:\frac{121}{52}=\frac{22}{13}*\frac{52}{121}=\frac{22}{1}*\frac{4}{121}=\frac{88}{121}=\frac{8}{11}$

g) $\frac{15}{18}:\frac{10}{21}=\frac{15}{18}*\frac{21}{10}=\frac{3}{6}*\frac{7}{2}=\frac{21}{12}=1\frac{9}{12}=1\frac{3}{4}$

h) $-\frac{44}{35}*(-\frac{7}{8})=(-\frac{11}{5})*(-\frac{1}{2})=\frac{11}{10}=1\frac{1}{10}$

i) $\frac{10}{19}:(-\frac{15}{38})=\frac{10}{19}*(-\frac{38}{15})=\frac{2}{1}*(-\frac{2}{3})=(-\frac{4}{3})=-1\frac{1}{3}$

j) $(1 \frac{3}{4}-\frac{11}{20})*(2 \frac{1}{2} -1 \frac{7}{18})=\\ \\ =(\frac{7}{4}-\frac{11}{20})*(\frac{5}{2}-\frac{25}{18})=\\ \\ =\frac{7}{4}*\frac{5}{2}+\frac{7}{4}*(-\frac{25}{18})+(-\frac{11}{20})*\frac{5}{2}+(-\frac{11}{20})*(-\frac{25}{18})= \\ \\ =\frac{35}{8}+(-\frac{175}{72})+(-\frac{11}{4})*\frac{1}{2}+(-\frac{11}{4})*(-\frac{5}{18})=\\ \\ =\frac{35}{8}+(-\frac{175}{72})+ (-\frac{11}{8})+\frac{55}{72}=\\ \\ =\frac{35*9}{8*9}+(-\frac{175}{72})+ (-\frac{11*9}{8*9})+\frac{55}{72}=\\ \\$

$=\frac{315}{72}+(-\frac{175}{72})+(-\frac{99}{72})+\frac{55}{72}=\\ \\ =\frac{370}{72}+(-\frac{274}{72})=\\ \\ =4\frac{82}{72}+(-3\frac{58}{72})= \\ \\ =1\frac{24}{72}=1\frac{2}{6}=1\frac{1}{3}$

zad2

a) $(4,2-3,8)*5,1=0,4*5,1=2,04$

b) $1,75*(4,12-3,82)=1,75*0,3=0,525$

c) $(0,75-0,26)*(2,16-1,84 )=\\ =1,62-1,38-0,5616+0,4784=\\=2,0984-1,9416=0,1568$

d) $(\frac{3}{4})-(1 \frac{1}{4})=\frac{3}{4}-\frac{5}{4}=-\frac{2}{4}=-\frac{1}{2}$

e) $(\frac{1}{2}-\frac{2}{5})*2 \frac{6}{7}=\\ \\=(\frac{5}{10}-\frac{4}{10})*\frac{20}{7}=\\ \\ =\frac{1}{10}*\frac{20}{7}=\frac{1}{1}*\frac{2}{7}=\frac{2}{7}$