Day 7
Name: _______________________
Binary Addition (and other bases)
1.
00101110
+ 01110011
-----------------
01101101
+ 00110111
----------------
00001111
+ 10101010
----------------
2. Convert the following base 10 addition into binary, then perform the addition, and then convert back
to base 10 to check your answer.
53
+ 47
------
103
+ 69
-------
63
+ 77
-------
3. Repeat the above addition exercises from #2, except this time, convert to base 5 instead of binary.
4.
10101011
- 01110001
-----------------
01111101
- 00110111
----------------
10001111
- 00101010
----------------
5. Using a shift cipher of n ≥ 3, write a message with at least 20 letters and then encode it using your
own cipher. Write this new coded message on a separate scrap of paper.
old new
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z