Question

10 Calculati:
a) [(120625) (21.10)) : (2.5:25)
b)6+2·[(3.5 - 2. 18:33. 11): 2').

Answer 1

Răspuns:

a) [(120•625)•(2³•10)]:(2•5³:25)⁵=60

= [75.000•(2•2•2•10)]:(2•5•5•5:25)⁵

= [75.000•(8•10)]:(2•125:25)⁵

= (75.000•80):(250:25)⁵

= 6.000.000:10⁵

= 6.000.000:10•10•10•10•10

= 6.000.000:100.000.

= 60

b) 6+2•[(3•5²-2²•18:3²+3•11):2²]=56

= 6+2•[(3•5•5-2•2•18:3•3+33):2•2]

= 6+2•[(3•25-4•18:9+33):5]

= 6+2•[(75-72:9+33):4]

= 6+2•[(75-8+33):4]

= 6+2•[(67+34):4]

= 6+2•(100:4)

= 6+2•25

= 6+50

= 56

Sper că te-am ajutat!