Question

sa se efectueze
a) 10x{475+2x{ [ 45+2x(400-298)]}

Answer 1

= 10 · { 475  + 2 · [ 45 + 2 · 102]} = 
   = 10 · { 475 + 2 · 249 } = 
    = 10 ·{ 475 + 498 } 
     = 10 ·973
      = 9730

Answer 2

$10 \times \{475+2 \times [45+2 \times (400-298)]\}= \\ =10 \times [475+2 \times (45+2 \times 102)]= \\ =10 \times [475+2 \times (45+204)]= \\ =10 \times (475+2 \times 249)= \\ =10 \times (475+498)= \\ =10 \times 973= \\ =9730$