ADD AND SUBTRACT WITHIN 20 SHEET 5 - ANSWER KEY

Oct 22, 2026

Worksheet answer key for an “Add and Subtract Within 20” practice set, focusing on solving mixed addition and subtraction equations using numbers from 1–20. The sheet provides 30 worked problems with step-formatted expressions and final results, followed by a challenge section that uses selected numbers to complete equations and reach a given total. Two alternative solutions are included for each challenge item to support verification and learning.

LanguageEnglish

CategoryExam

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Add and Subtract Within 20 (Sheet 5)

Practice Problems (1-30)

Challenge: Choose Numbers and Complete Equations

ADD AND SUBTRACT WITHIN 20 SHEET 5 1) 12 + 4 – 5 = 16) 6 + 11 – 9 = 2) 3 + 15 – 6 = 17) 16 – 10 + 8 = 3) 9 – 3 + 8 = 18) 4 + 13 – 6 = 4) 14 – 5 + 7 = 19) 17 – 5 + 8 = 5) 6 + 10 – 12 = 20) 8 + 12 – 3 = 6) 17 – 6 + 4 = 21) 14 + 5 – 12 = 7) 12 + 7 – 9 = 22) 20 – 13 + 11 = 8) 4 + 11 – 6 = 23) 14 – 9 + 5 = 9) 19 – 7 + 5 = 24) 11 + 7-15 = 10) 10 – 3 + 11 = 25) 13 + 6 – 12 = 11) 6 + 12 – 3 = 26) 19 – 11 + 8 = 12) 20 – 17 + 4 = 27) 12 – 7 + 14 = 13) 18 – 11 + 6 = 28) 3 + 15 – 11 = 14) 3 + 14 – 8 = 29) 6 + 14 – 11 = 15) 10 – 8 + 13 = 30) 20 – 11 + 6 = CHALLENGE | 8 | 15 | 3 | 9 | 7 | | --- | --- | --- | --- | --- | Choose any 3 of the numbers above to complete each of the equations. | | | + | | ̶ | | = | 0 | | | ̶ | | + | | = | 13 | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | | | | | | | | | | | | | | | | ADD AND SUBTRACT WITHIN 20 SHEET 5 ANSWERS 1) 12 + 4 – 5 = 11 16) 6 + 11 – 9 = 8 2) 3 + 15 – 6 = 12 17) 16 – 10 + 8 = 14 3) 9 – 3 + 8 = 14 18) 4 + 13 – 6 = 11 4) 14 – 5 + 7 = 16 19) 17 – 5 + 8 = 20 5) 6 + 10 – 12 = 4 20) 8 + 12 – 3 = 17 6) 17 – 6 + 4 = 15 21) 14 + 5 – 12 = 7 7) 12 + 7 – 9 = 10 22) 20 – 13 + 11 = 18 8) 4 + 11 – 6 = 9 23) 14 – 9 + 5 = 10 9) 19 – 7 + 5 = 17 24) 11 + 7-15 = 3 10) 10 – 3 + 11 = 18 25) 13 + 6 – 12 = 7 11) 6 + 12 – 3 = 15 26) 19 – 11 + 8 = 16 12) 20 – 17 + 4 = 7 27) 12 – 7 + 14 = 19 13) 18 – 11 + 6 = 13 28) 3 + 15 – 11 = 7 14) 3 + 14 – 8 = 9 29) 6 + 14 – 11 = 9 15) 10 – 8 + 13 = 15 30) 20 – 11 + 6 = 15 CHALLENGE | 8 | 15 | 3 | 9 | 7 | | --- | --- | --- | --- | --- | Here are two different solutions to each of the challenges. | 8 + 7 – 15 = 0
7 + 8 – 15 = 0 | 15 – 9 + 7 = 13
9 – 3 + 7 = 13 | | --- | --- |

FAQs

What range of numbers do the problems use in this worksheet?

The equations are designed for “within 20,” using numbers from 1 to 20 to form addition and subtraction expressions.

How many standard problems are included before the challenge section?

There are 30 practice problems listed, numbered 1 through 30, each with a final answer.

What does the challenge section require the student to do?

The challenge instructs choosing specific numbers from a given set to fill in blanks and complete equations so they equal the target result (including zero in the example).

Are there multiple solutions for the challenge items?

Yes. The document states that there are two different solutions to each of the challenges, and it shows alternative completed equations.

Oct 22, 2026

Uploaded by River Wang