Code Breakers - Addition (Year 3) | CGP Plus - Free Printable

Let’s solve this step by step.

We have a code breaker puzzle where each letter of the alphabet is assigned a number. We need to:

1. Solve each addition problem.
2. Match the answer to the correct letter using the code chart.
3. Write down the letters in order to reveal the secret message.

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First, let’s list all the problems and solve them one by one.

Left Column:

1. 8 + 9 + 5 = 22 → Look up 22 → Y
2. 53 + 75 = 128 → Look up 128 → O
3. 567 + 30 = 597 → Look up 597 → U
4. 281 + 7 = 288 → Look up 288 → A
5. 323 + 400 = 723 → Look up 723 → D
6. 98 + 65 = 163 → Look up 163 → E
7. 88 + 200 = 288 → Look up 288 → A
8. 399 + 500 = 899 → Look up 899 → H
9. 590 + 7 = 597 → Look up 597 → U
10. 345 + 30 = 375 → Look up 375 → M
11. 238 + 50 = 288 → Look up 288 → A

Wait — that gives us: Y O U A D E A H U M A → That doesn’t make sense. Let me double-check my math and matching.

Actually, let’s go slowly and write each answer with its letter clearly.

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Let me redo it carefully, writing each sum and then finding the letter.

Left Column Problems:

1. 8 + 9 + 5 = 22 → Code for 22 is Y
2. 53 + 75 = 128 → Code for 128 is O
3. 567 + 30 = 597 → Code for 597 is U
4. 281 + 7 = 288 → Code for 288 is A
5. 323 + 400 = 723 → Code for 723 is D
6. 98 + 65 = 163 → Code for 163 is E
7. 88 + 200 = 288 → Code for 288 is A
8. 399 + 500 = 899 → Code for 899 is H
9. 590 + 7 = 597 → Code for 597 is U
10. 345 + 30 = 375 → Code for 375 is M
11. 238 + 50 = 288 → Code for 288 is A

So left column letters: Y, O, U, A, D, E, A, H, U, M, A → “YOUADEAHUMA” — still not right. Maybe I’m reading the columns wrong? Wait — there are two columns of problems. The message is probably formed by going row by row across both columns? Or maybe top to bottom left column first, then right column?

Looking at the layout: There are 11 rows total (counting the headers). Each row has a problem on the left and a problem on the right. So likely, we should do row 1 left, then row 1 right, then row 2 left, row 2 right, etc., to get the full message.

Let me try that.

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Let’s pair them row by row:

Row 1:
- Left: 8+9+5=22 → Y
- Right: 177+9=186 → Code for 186 is N

→ So far: Y N

Row 2:
- Left: 53+75=128 → O
- Right: 177+90=267 → Code for 267 is B

→ Y N O B

Row 3:
- Left: 567+30=597 → U
- Right: 188+100=288 → A

→ Y N O B U A

Row 4:
- Left: 281+7=288 → A
- Right: 499+90=589 → L

→ Y N O B U A A L

Row 5:
- Left: 323+400=723 → D
- Right: 67+200=267 → B

→ Y N O B U A A L D B

This is getting messy. Maybe the message is just the left column first, then the right column? Let’s try solving all left column answers first, then all right column answers.

Left column answers (in order):

1. 22 → Y
2. 128 → O
3. 597 → U
4. 288 → A
5. 723 → D
6. 163 → E
7. 288 → A
8. 899 → H
9. 597 → U
10. 375 → M
11. 288 → A

That spells: YOUADEAHUMA — still nonsense.

Wait — perhaps I made a mistake in matching numbers to letters. Let me recheck the code chart from the image description.

From the user's image description (which I can't see but was provided in text earlier), here’s the code:

Top row:
A=288, B=579, C=267, D=323, E=163, F=656, G=56, H=899, I=121, J=129, K=273, L=589, M=375

Bottom row:
N=186, O=128, P=184, Q=36, R=723, S=79, T=919, U=597, V=999, W=88, X=179, Y=22, Z=303

Okay, so let’s verify some matches:

- 22 → Y ✔
- 128 → O ✔
- 597 → U ✔
- 288 → A ✔
- 723 → R? Wait! In the bottom row, R=723 — not D!

I think I made a critical error here.

In the bottom row:
R = 723 — yes! Not D. D is 323.

So correction:

Problem 5: 323 + 400 = 723 → 723 is R, not D.

Similarly, let’s re-solve everything with correct mappings.

Let me make a table of all sums and their correct letters.

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Left Column:

1. 8 + 9 + 5 = 22 → Y
2. 53 + 75 = 128 → O
3. 567 + 30 = 597 → U
4. 281 + 7 = 288 → A
5. 323 + 400 = 723 → R (not D!)
6. 98 + 65 = 163 → E
7. 88 + 200 = 288 → A
8. 399 + 500 = 899 → H
9. 590 + 7 = 597 → U
10. 345 + 30 = 375 → M
11. 238 + 50 = 288 → A

So left column: Y, O, U, A, R, E, A, H, U, M, A → “YOUAREAHUMA” — closer! “You are a huma...” — probably “human”? But last letter is A.

Now right column:

1. 177 + 9 = 186 → N
2. 177 + 90 = 267 → C
3. 188 + 100 = 288 → A
4. 499 + 90 = 589 → L
5. 67 + 200 = 267 → C
6. 397 + 200 = 597 → U
7. 500 + 89 = 589 → L
8. 248 + 40 = 288 → A
9. 889 + 30 = 919 → T
10. 108 + 20 = 128 → O
11. 683 + 40 = 723 → R

Right column: N, C, A, L, C, U, L, A, T, O, R → “NCALCULATOR” — wait, that’s “calculator” misspelled? No — N C A L C U L A T O R → if you read it: “N CALCULATOR”? That doesn’t fit.

But if we combine left and right columns row by row:

Row 1: Y (left) + N (right) → YN
Row 2: O + C → OC
Row 3: U + A → UA
Row 4: A + L → AL
Row 5: R + C → RC
Row 6: E + U → EU
Row 7: A + L → AL
Row 8: H + A → HA
Row 9: U + T → UT
Row 10: M + O → MO
Row 11: A + R → AR

Still not making sense.

Wait — perhaps the message is only from the left column? “YOUAREAHUMA” — almost “You are a human”, but ends with A instead of N.

Last problem left column: 238 + 50 = 288 → A. But 288 is A. What if it’s supposed to be something else?

238 + 50 = 288 — correct. And 288 is A.

But “You are a human” would end with N. N is 186.

Is there a problem that equals 186? Yes — right column first problem: 177+9=186 → N.

Perhaps the full message is combining both columns in sequence: left column first 11 letters, then right column next 11 letters.

Left: Y O U A R E A H U M A → “YOUAREAHUMA”

Right: N C A L C U L A T O R → “NCALCULATOR”

Together: “YOUAREAHUMAN CALCULATOR” — oh! That makes sense!

“You are a human calculator” — but we have “YOUAREAHUMA” + “NCALCULATOR” = “YOUAREAHUMAN CALCULATOR” — perfect!

But in our left column, the 11th letter is A (from 288), and right column starts with N (186). So when combined: ...A + N = “AN”, which completes “HUMAN”.

Yes!

So the full message is:

Left column letters: Y O U A R E A H U M A
Right column letters: N C A L C U L A T O R

Combined: Y O U A R E A H U M A N C A L C U L A T O R

Which reads: YOU ARE A HUMAN CALCULATOR

Perfect!

Let me confirm each calculation once more to be sure.

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Final verification:

Left Column:

1. 8+9+5=22 → Y
2. 53+75=128 → O
3. 567+30=597 → U
4. 281+7=288 → A
5. 323+400=723 → R
6. 98+65=163 → E
7. 88+200=288 → A
8. 399+500=899 → H
9. 590+7=597 → U
10. 345+30=375 → M
11. 238+50=288 → A

→ YOUAREAHUMA

Right Column:

1. 177+9=186 → N
2. 177+90=267 → C
3. 188+100=288 → A
4. 499+90=589 → L
5. 67+200=267 → C
6. 397+200=597 → U
7. 500+89=589 → L
8. 248+40=288 → A
9. 889+30=919 → T
10. 108+20=128 → O
11. 683+40=723 → R

→ NCALCULATOR

Combined: YOUAREAHUMAN CALCULATOR → “You are a human calculator”

Yes! All calculations check out.

Final Answer:
You are a human calculator