ADDITION & SUBTRACTION WITHIN 20 CODEBREAKER 1 - Answers - Use the clues to work out the answer to this joke

Oct 22, 2026

“Addition & Subtraction within 20 Codebreaker 1” uses a code-breaking puzzle to turn number facts into letters. Students apply the given arithmetic clues—such as 10+5, 16–4, 18-12, and other fact pairs—to determine the correct letter positions across a number-to-letter grid. The worksheet includes the joke prompt about why the general wore long sleeves, then provides the filled-in answer letters, their corresponding answer numbers, and the final decoded message.

LanguageEnglish

CategoryExam

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Addition & Subtraction Within 20 Codebreaker 1

Puzzle instructions

Clue-to-letter tables

Decoded answer

Name Date ADDITION & SUBTRACTION WITHIN 20 CODEBREAKER 1 Use the clues to work out the answer to this joke. | A | B | C | D | E | F | H | I | K | L | M | N | O | P | R | S | T | U | V | W | . | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | Why did the general always wear long sleeves? | Answer Letter | S | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | 15 | | | | | | | | | | | | Fact | 10+5 | 16–4 | | 7+9 | 18-12 | 9-9 | 3+13 | | 16-5 | 20-8 | | | Answer Letter | | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | | | | | | | | | | | | | Fact | 18-6 | 2+9 | 17-13 | | 14-12 | 3+9 | 5+12 | 19-10 | 16-13 | | | | Answer Letter | | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | | | | | | | | | | | | | Fact | 18-6 | 15-14 | 9+6 | 15-11 | 8+6 | 5+13 | 20-16 | | 15-9 | 13-6 | 3+12 | | Answer Letter | | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | | | | | | | | | | | | | Fact | 9-9 | 1+13 | 19-9 | 15-8 | 11-7 | 4+11 | 9+11 | | | | | Answer Name Date ADDITION & SUBTRACTION WITHIN 20 CODEBREAKER 1 ANSWERS Use the clues to work out the answer to this joke. | A | B | C | D | E | F | H | I | K | L | M | N | O | P | R | S | T | U | V | W | . | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | Why did the general always wear long sleeves? | Answer Letter | S | O | | T | H | A | T | | N | O | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | 15 | 12 | | 16 | 6 | 0 | 16 | | 11 | 12 | | | Fact | 10+5 | 16–4 | | 7+9 | 18-12 | 9-9 | 3+13 | | 16-5 | 20-8 | | | Answer Letter | O | N | E | | C | O | U | L | D | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | 12 | 11 | 4 | | 2 | 12 | 17 | 9 | 3 | | | | Fact | 18-6 | 2+9 | 17-13 | | 14-12 | 3+9 | 5+12 | 19-10 | 16-13 | | | | Answer Letter | O | B | S | E | R | V | E | | H | I | S | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | 12 | 1 | 15 | 4 | 14 | 18 | 4 | | 6 | 7 | 15 | | Fact | 18-6 | 15-14 | 9+6 | 15-11 | 8+6 | 5+13 | 20-16 | | 15-9 | 13-6 | 3+12 | | Answer Letter | A | R | M | I | E | S | . | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Answer Number | 0 | 14 | 10 | 7 | 4 | 15 | 20 | | | | | | Fact | 9-9 | 1+13 | 19-9 | 15-8 | 11-7 | 4+11 | 9+11 | | | | | Answer SO THAT NO ONE COULD OBSERVE HIS ARMIES.

FAQs

What does the worksheet ask students to do?

Use the provided clues to work out the answer to the joke by determining the correct letters from the arithmetic facts.

What math skills are practiced in this codebreaker?

Addition and subtraction within 20, using number facts such as sums and differences shown in the tables.

Where does the final answer come from?

The final message is decoded from the filled-in answer letters and their corresponding answer numbers derived from the clue facts.

Oct 22, 2026

Uploaded by River Wang