Question

1. Rezolvă: a) (2³.3²-6²): 2²+2 b) [(15²:5-3²)+12]:6 c) [(2³)4: (25)² + (5³)7: (54)5]: 3-3 d) 3²-5-24:2 e) 3-(5²-4²) - 6​

Answer 1

a) (8×9-36):4+2

(72-36):4+2

36:4+2

9+2=11

b) [(225:5-9)+12]:6

[(45-9)+12]:6

[36+12]:6

48:6=8

c) [2la12:2la10+5la21:5la20]:3-3

[2la2+5la1]:3-3

[4+5]:3-3

9:3-3

3-3=0

d) 9×5-16:2

45-8=37

e)3×(25-16)-6

3×9-6

27-6=21