Question

Sa Exercitii si probleme recapitulative 1. Calculează! b) (5 + 5×5) × 5-5+5×5 2 × [35+2× (500 - 398)] - 428 279 +9 x [27 +27 x (27-9 x0) +9] +9 - 790 ​

Answer 1

Răspuns:

Explicație pas cu pas:

(5 + 5×5) × 5-5+5×5 = 30x5-30 = 150-30=120

2 × [35+2× (500 - 398)] - 428 =

2x(35+2x102)-428 =

2x(35+204)-428 =

2x239-428 =

478-428 = 50

279 +9 x [27 +27 x (27-9 x0) +9] +9 - 790 ​=

279+9x(27+27x27+9)+9-790=

279+9x(27+729+9)+9-790=

279+9x765+9-790=

279+6885+9-790=

7173-790 = 6383