Va rog exercițiul 1 ofer coroana și 5 stele
Răspunsuri la întrebare
Răspuns:
a) 785 + 115 + 37 × (15+ 23 × 3)
= 785 + 115 + 37 × (15 + 69)
= 785 + 115 + 37 × 84
= 785 + 115 + 3108
= 785 + 3223
= 4008
b) 624 - 120 + 2025 : (226 - 17 × 13)
= 624 - 120 + 2025 : (226 - 221)
= 624 - 120 + 2025 : 5
= 624 - 120 + 405
= 504 + 405
= 909
c) 145 + 47 × [215 × 110 - 83 × (405 - 18 × 16)]
= 145 + 47 × [215 × 110 - 83 × ( 405 - 288)]
= 145 + 47 × (215 × 110 - 83 × 117)
= 145 + 47 × (215 × 110 - 9711)
= 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+2×3+[105 :15 +(120-95)×10]×2}
= 512-287+10×[15+2×3+(105 :15 + 25 × 10)×2]
= 512-287+10×[15+2×3+(7+250)×2]
= 512-287+10×(15+2×3+257×2)
= 512-287+10×(15+6+514)
= 512-287+10×(21+514)
= 512-287+10×535
= 512 - 287 + 5350
= 225 + 5350
= 5575
e) 15 × 2^2 : 10 - 3^3 : 27 + 125 : 5^2 × 11^2
= 15 × 4 : 10 - 27 : 27 + 125 : 25 × 121
= 60 : 10 - 1 + 5 × 121
= 6 - 1 + 605
= 5 + 605
= 610
f) [(2 × 3 × 5)^2 - 8^4 : 8^2] : 2^2 - 4 × 5 ×10
= (30^2 - 8^4-2) : 2^2 - 4 × 5 × 10
= (900 - 8^2) : 4 - 4 × 5 × 10
= (900 - 64) : 4 - 4 × 5 × 10
= 225 - 16 - 4 × 5 × 10
= 225 - 16 - 200
= 209-200
= 9