Question

Efectuatii
a)785+115+37×(15+23×12)
b)624-120+2025:(266-17×13)
c)145+47×[215×110-83×(405-18×16)]
d)512-287+10×{15+2×3+[105:15+(120-5×19)×10]×2}
e){123×35+10×[47+10×(407+2405:65)]-2785}×10

Mulțumesc!

Answer 1

a) 785+115+37×(15+23×12)=

785+115+37×291=

785+115+10767= 11667

b) 624-120+2025:(266-17×13)=

624-120+2025:45=

624-120+45= 529

c) 145+47×[215×110-83×(405-18×16)]=

145+47×(215×110-83×117)=

145+47×(23650-9711)=

145+47×13939=

145+655133= 655278

d) 512-287+10×{15+2×3+[105:15+(120-5×19)×10]×2}=

512-287+10×{15+6+[7+(120-95)×10]×2}=

512-287+10×[15+6+(7+25×10)×2]=

512-287+10×(15+6+257×2)=

512-287+10×535=

225+5350= 5575

e) {123×35+10×[47+10×(407+2405:65)]-2785}×10=

{4305+10×[47+10×(407+37)]-2785}×10=

{4305+10×[47+10×444]-2785}×10=

{4305+10×[47+4440]-2785}×10=

{4305+10×4487-2785}×10=

{4305+44870-2785}×10=

46390×10= 463900