Cipher Code Worksheet
TOP SECRET Mission File #50-EQ • Classified Math Squad
Page 1 of 2
Operation Cipher Code
Solve 50 one-step equations to crack the encrypted classroom message!
Name:
Date:
Class:
Score:
Agent Mission: Solve each equation by showing inverse operations. Record your answer on the line. When you complete both pages, match your solutions with the Decoder Key on Page 2 to reveal the secret encouraging code!
Example: x + 148 = 425 ➔ x = 277
#01
x + 184 = 309
x =
#02
x − 72 = 123
x =
#03
x + 65 = 975
x =
#04
x − 87 = 38
x =
#05
165 + x = 605
x =
#06
x − 235 = 380
x =
#07
x + 418 = 708
x =
#08
x − 56 = 32
x =
#09
x + 275 = 635
x =
#10
234 + x = 322
x =
#11
x − 184 = 176
x =
#12
x + 512 = 852
x =
#13
x − 73 = 15
x =
#14
x − 165 = 125
x =
#15
x + 389 = 539
x =
#16
x − 180 = 495
x =
#17
462 + x = 587
x =
#18
x − 68 = 82
x =
#19
x + 490 = 850
x =
#20
x − 225 = 185
x =
#21
198 + x = 813
x =
#22
x + 614 = 764
x =
#23
x − 94 = 31
x =
#24
x + 168 = 888
x =
#25
x + 456 = 544
x =
Midway Mission Check: Double-check your inverse operations before turning to Page 2!
Turn to Page 2 ➔
TOP SECRET Mission File #50-EQ • Problems 26–50 & Decoder Station
Page 2 of 2
Finish solving equations #26 to #50, then decode your secret message below!
Keep answers neat & legible
#26 x − 148 = 467
x =
#27 x + 729 = 854
x =
#28 x − 138 = 152
x =
#29 x − 47 = 41
x =
#30 x + 283 = 758
x =
#31 560 + x = 850
x =
#32 x − 118 = 687
x =
#33 x + 137 = 942
x =
#34 x − 248 = 264
x =
#35 x − 55 = 95
x =
#36 x + 249 = 924
x =
#37 x − 89 = 36
x =
#38 286 + x = 436
x =
#39 x − 275 = 165
x =
#40 x − 95 = 710
x =
#41 x + 465 = 845
x =
#42 x + 378 = 503
x =
#43 x − 215 = 75
x =
#44 619 + x = 707
x =
#45 x − 34 = 116
x =
#46 x + 355 = 645
x =
#47 x + 328 = 768
x =
#48 x + 372 = 782
x =
#49 x − 39 = 15
x =
#50 x − 145 = 85
x =
Cipher Decoder Key
Match each solution (x) to its letter
A = 125
B = 340
E = 88
F = 512
G = 230
H = 675
I = 410
K = 720
L = 195
M = 360
N = 54
O = 805
P = 475
R = 290
S = 615
T = 150
U = 380
W = 910
Y = 440
Classified Encouraging Message
Write the letter corresponding to each problem number:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Mission Accomplished: Once decoded, sign your agent signature and turn in to Command!
Agent Signature:
