Question

4. Determinați numerele a şi b
a-2x(3×5:3+9×3:9): [16x2-2x(3×2×2×5-5×2×5):5-2×2× 3];
b-9×13×(2×13-2×2×5)+2x9:9]: 3:3+144: 12.
Care sunt numerele

Answer 1

Răspuns:

Explicație pas cu pas:

a) 2x(3×5:3+9×3:9): [16x2-2x(3×2×2×5-5×2×5):5-2×2× 3]=

2x(15:3+27:9): [32-2x(12×5-10×5):5-12]=

2x(5+3): [32-2x(60-50):5-12]=

2x8: (32-2x10:5-12)=

16: (32-20:5-12)=

16:(32-4-12)=16:16=1

la b) unde incepe paranteza dreapta ?