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MusatTiberiu
a fost răspuns

Calculati (5/12+7/18) : 0,29 - 0,(7)

Dau coroana
/ = linie de fractoe, "supra"

Răspuns :

Icecon2005
(5/12+7/18) : 0,29 - 0,(7)
0,7=7/9

0,29=29/100

5/12+7/18=5/(3*2*2)-7/(2*3*3)=(5*3-7*2)/2*2*3*3=1/36

1/36:29/100-7/9=

=1/36*100/29 - 7/9

=100/(36*29)-7/9

=(100-7*4*29)36*29

=(100-7*4*29)/(36*29)

=(100-812)/1044

=-712/1044

= - 153/261
=

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