Question

Ajutati-ma plssss. Dau coroana.ex 6 7 8 9 10 11. (rezolvarea) . help me pls

Answer 1

6) perioada contine 3 zecimale
   7÷3= 2 rest 1⇒ doua perioade complete si prima zecimala dintr-o alta perioada  ⇒ a 7 a zecimala va fi 2
7) V cub= 4×4×4= 64 cm³
8) 24:00 - 22:15 + 06:45= 01:45+06:45= 8:30= 8×60+30= 480+30= 510 minute
9) 5×4,6= 23 lei
10) ( 2¹⁷×3¹⁶ + 2¹⁶×3¹⁷) ×6¹⁶= 2¹⁶×3¹⁶×(2+3)÷6¹⁶= (2×3)¹⁶×5÷6¹⁶= 6¹⁶×5÷6¹⁶=5
11) primele 10 elemente se vor calcula cu valorile n∈{0,1,2,....,9}
     x= 3×0+1= 0+1=1
     x= 3×1+1=3+1=4
     x=3×2+1= 6+1=7
    .................
    x=3×9+1= 27+1= 28
S= 1+4+7+.......+28= (28+1)[(28-1)÷3+1]÷2= 29(27÷3+1)÷2=
     29(9+1)÷2= 29×10÷2=29×5=145