Question

3. Calculează:
a) 1+2·[1 +6.(15 - 10:5): 2 + 2] =
b) 5+ 3. {1+2·[4+4·(3+3:3)] - 1} -5=​

Answer 1

Explicație pas cu pas:

a) 1+2×[1+6×(15-2):2+2]=

=1+2×(1+6×13:2+2)=

=1+2×(1+78:2+2)

=1+2×(1+39+2)

=1+2×(40+2)

=1+2×42

=1+84

=85

b) 5+3×{1+2×[4+4×(3+1)]-1}-5

=5+3×[1+2×(4+4×4)-1]-5

=5+3×[1+2×(4+16)-1]-5

=5+3×(1+2×20-1)-5

=5+3×(1+40-1)-5

=5+3×(41-1)-5

=5+3×42-5

=5+126-5

=131-5

=126