A) 12/91*[1/3+1:(1/7+6/7*1/6):7/6]+6/13*[1/4+(7/36-1/24):7/6]=
b)[8/35+[3/2-33/55)+(3/14-2/35)-(2-12/7+5/14)}]*3 si1/3=
c) 21 si 1/5:[7si 1/5-3si1/10+6si1/2]+2/3*[5/2-5/9]:1/27=
calculati ordinea efectuari operatiilor
undei si este intreg
va rog ajutatima urgent dau coroana celui mai bun si rezultatele de la final tre sa dea la
a-8/13
b=1
c=37
multumesc
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Boberschilacram
September 2019 | 0 Replies
Problema1O persoana depune la banca 2500 de lei cu dobanda de 7% pe an .cat este dobanda si ce suma se ridica dupa un an? Problema 2Unui produs cu pretul de 2500 lei i se aplica de doua ori scumpiri succesive de cate 10%fiecare.Care este pretul dupa a doua scumpire?Problema 3Unui produs cu pretul de 2500 lei i se aplica o majorare cu 20%.Care este pretul dupa a majorareProblema 3Din suma de 150 lei pe care o avea ,Ana a cheltuit pe un ghiozdan 30% Cu 40%din rest si-a cumparatcaiete si creioane.Cati lei i-au mai ramasAnei?va rog urgent am nevoie multumesc
12/91*[1/3+1:(1/7+6/7*1/6):7/6]+6/13*[1/4+(7/36-1/24):7/6]=
=12/91*[1/3+1:(1/7+1/7) ×6/7]+6/13*[1/4+(7*2-3)/72 ×6/7]=
=12/91*[1/3+1x7/2 ×6/7]+6/13*[1/4+11/72 ×6/7]=
=12/91*[1/3+3]+6/13*[1/4+11/84]=
=12/91*10/3+6/13*(21+11)/84]=
=40/91+16/91=
=56/91=
=8/13
b)
{8/35+[(3/2-33/35)+(3/14-2/35)-(2-12/7+5/14)]}*3intregi1/3=
={8/35+[(105-66)/70+(15-4)/70-(28-24+5)/14)]}*10/3=
={8/35+[39/70+11/70-9/14)]}*10/3=
={8/35+[(50-45)/70]}*10/3=
={8/35+5/70}*10/3=
=(16+5)/70 *10/3=
=21/70 *10/3=
=3/10*10/3=1
c) 21 si 1/5:[7si 1/5-3si1/10+6si1/2]+2/3*[5/2-5/9]:1/27=
=106/5:[36/5-31/10+13/2]+2/3*[5/2-5/9]:1/27=
=106/5:[72/10-31/10+65/10]+2/3*[45/18-10/18] *27=
=106/5:(106/10)+2/3*35/18 *27=
=106/5*10/106+70/2=
=2+35=37