1)
1010001111 → 𝑋10
𝑋 = 1 ∗ 29 + 1 ∗ 27 + 1 ∗ 23 + 1 ∗ 22 + 1 ∗ 2 + 1 ∗ 20 = 512 + 128 + 8 + 4 + 2 + 1 = 655
2)
18010 → 𝑋2
180 2
180 90
2
0
90
45 2
0
44 22
2
1 22 11 2
0
10 5
1
2
4
2
2
1
2 1
0
10110100
3)
42,678 → 𝑋10
4 ∗ 8 ∗ 2 ∗ 80 + 6 ∗ 8−1 + 7 ∗ 8−2 = 34,859375