Matematică, întrebare adresată de munteanuion1973, 9 ani în urmă

a) 2307+{3702+[270:3+3*(280*5-3*230)]}
b) 31975+200*[8*(1270-2350)+2340:5]
c) 785+115+37*(15+23*12)
d)624-120+2025:(266-17*13)
e)145+47*[215*110-83*(405-18*16)]
f)512-287+10*{15+2*3+[105:15+(120-5*19)*10]*2}
h){123*35+10*[47+10*(407+2405:65)]-2785}*10

Răspunsuri la întrebare

Răspuns de finamihai
25
A) 2307+{3702+[270:3+3*(280*5-3*230)]}=2307+{3702+[90+3(1400-690)]}=2307+{3702+[90+3x710]}=
2307+{3702+[90+2130]}=
2307+3702+90+2130=8229

b) 31975+200*[8*(1270-2350)+2340:5]=
31975+200*[8*(-1080)+468]=31975+200x[-8640+468]=
31975+200x(-8172)=
31975-1634400=-1602425

c) 785+115+37*(15+23*12)
900+37x(15+276)=
900+37x291=
900+10767=11667

d)624-120+2025:(266-17*13)
504+2025:(266-221)=
504+2025:45=
504+45=549

e)145+47*[215*110-83*(405-18*16)]=
145+47x[23650-83x(405-288)]=
145+47x[23650-83x117]=
145+47x[23650-9711]=
145+47x13939=
145+655133=655278

f)512-287+10*{15+2*3+[105:15+(120-5*19)*10]*2}
225+10x{15+6+[7(120-95)x10]x2}=
225+10x{21+[7x25x10]x2}=
225+10x{21+1750x2}=
225+10x{21+3500}=
225+10x3521=
225+35210=35435

h){123*35+10*[47+10*(407+2405:65)]-2785}*10=
{4305+10x[47+10x(407+37)]-2785}x10=
{4305+10x[47+10x444]-2785}x10=
{4305+10x[47+4440]-2785}x10=
{4305+10x4487-2785}x10=
{4305+44870-2785}x10=
46390x10=463900

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