Question

pomocy plis matma klasa 7
w załączniku zaznaczone czego nie kumam proszę o działania mam na to 1h plis będzie dużo pkt serce i naj​

Answer 1

Verified answer

[tex](4,6-2\frac{1}{3}):(4,6+ 2\frac{1}{3})=(\frac{46}{10} -\frac{7}{3} ):(\frac{46}{10} +\frac{7}{3})= (\frac{138}{30}-\frac{70}{30} ):(\frac{138}{30}+ \frac{70}{30})=\frac{68}{30}:\frac{208}{30}=\frac{68}{30}*\frac{30}{208}=\frac{68}{208}=\frac{17}{52}[/tex]

[tex]1\frac{1}{2} *1\frac{1}{3} *1\frac{1}{4} =\frac{3}{2}*\frac{4}{3} *\frac{5}{4} =\frac{5}{2}=2,5[/tex]

[tex]\frac{4*7*3}{21*12*5}= \frac{4*21}{21*12*5}=\frac{4*1}{1*12*5}=\frac{4}{60}=\frac{1}{15}[/tex]

[tex]18*\frac{5}{9} *2\frac{2}{3}=2*5* \frac{8}{3} =10*\frac{8}{3}=\frac{80}{3}=26\frac{2}{3}[/tex]

[tex]5\frac{3}{4}:1\frac{7}{16}=\frac{23}{4} :\frac{23}{16} =\frac{23*16}{4*23} =\frac{1*4}{1*1} =4[/tex]

[tex]12\frac{5}{6} :4\frac{7}{12}=\frac{77}{6}:\frac{55}{12} =\frac{77*12}{6*55} =\frac{7*2}{1*5}=\frac{14}{5}=2,8[/tex]

[tex]2\frac{2}{5} :4\frac{1}{6}=\frac{12}{5}:\frac{13}{6}=\frac{12*6}{5*13} =\frac{72}{65}=1\frac{7}{65}[/tex]