efectuati, respectand ordinea efectuari operatiilor.
a)371+5*{47+3*[25*22-20*(48-2*23)-347]}
b)20+10*{957-2*[28*37-(2*87+25*18)]}
c)125+3*[21*48-(33*10-13*13)-12*31]:5
Răspunsuri la întrebare
Răspuns:
a)
371+5*{47+3*[25*22-20*(48-2*23)-347]}=
371+5*{47+3*[550-20*(48-46)-347]}=
371+5*[47+3*(550-20*2-347)]=
371+5*[47+3*(550-40-347)]=
371+5*[47+3*(510-347)]=
371+5*(47+3*163)=
371+5*(47+489)=
371+5*536=
371+2 680=
3 051
25× 23× 20× 163× 536×
22 2 2 3 5
--------- ----------- ------------ ------------- ----------
50 46 40 489 2680
50
------------
550
b)
20+10*{957-2*[28*37-(2*87+25*18)]}=
20+10*{957-2*[1 036-(174+450)]}=
20+10*[957-2*(1 036-624)]=
20+10*(957-824)=
20+10*133=
20+1 330=
1 350
28× 87× 25× 412×
37 2 1 8 2
------------ ---------- ------------ ----------
196 174 200 824
84 25
------------- ------------
1036 450
c)
125+3*[21*48-(33*10-13*13)-12*31]:5=
125+3*[1 008-(330-169)-372]:5=
125+3*(1 008-161-372):5=
125+3*(847-372):5=
125+3*475:5=
125+1 425:5=
125+385=
510
21× 13× 1 2× 475× 1425 : 5 =285
48 13 31 3 10
------------ ---------- ------------ ---------- -------
168 39 1 2 1425 =42
84 13 36 =40
------------- ------------ ---------- -----------
1008 169 372 = =25
= =25
-------------
= = = =