Add 1101base2, 10111base2, and 111base2

Answer 1

1101₂ + 10111₂ + 111₂

1101₂  = 1×2⁰ + 0×2¹ + 1×2² + 1×2³

            = 1 + 0 + 4 + 8

            = 13

10111₂  = 1×2⁰ +1×2¹ + 1×2² + 0×2³ + 1×2⁴

              = 1 + 2 + 4 + 0 + 16

              = 23

111₂  = 1×2⁰ + 1×2¹ + 1×2²

         = 1 + 2 + 4

         = 7

1101₂ + 10111₂ + 111₂  = 13 + 23 + 7

                                         = 43 = 101011₂