Made with the help of AI from public curriculum standards, then checked. Mistakes can slip through, so please look it over before use. Found one? Tell us and we will fix it.
What's on the worksheet
Solve the problem in each square. Color by the code.
Solve. Write the answer.
Write a subtraction problem that equals 4. ★
Skills practiced
Each square holds a subtraction fact within 20 that crosses ten, such as 13 − 5 or 16 − 9. Your child solves it, finds the difference in the color code, and colors the square, and a red mushroom slowly appears. These are the facts first graders find hardest, so the picture gives a reason to keep going and a quick way to spot a wrong answer. Below the grid are three more facts and one open question: write a subtraction that equals a given number.
Common Core 1.OA.C.6: Adding and subtracting up to 20, with quick recall of facts to 10
Common Core 1.OA.B.4: Thinking of subtraction as finding the missing part of an addition
Read the color key at the top together: which color goes with each number or letter.
Your child solves the problem, counts the dots, or reads the letter in each square and colors it the matching color.
Squares marked leave white stay white.
The picture that appears shows right away if the work is correct.
Tips for parents and teachers
Show your child one strategy and stick with it, such as going back to 10 first: for 13 − 5, take 3 to get to 10, then 2 more to get to 8. Thinking addition also works: 5 plus what makes 13? If a square turns out the wrong color, solve that fact together with a number line or counters; the mistake is usually off by one, from counting the starting number.
Make it easier or harder
Easier: Write a number line from 0 to 20 at the top of the page, and let your child solve one row a day instead of the whole grid.
Harder: Time the second half of the grid, or ask your child to write the matching addition fact for each color in the code, like 8 + 5 = 13.
Answer key
Show the answer key
Answer Key: Subtraction Color by Number: Mushroom
1st Grade · Math
CCSS 1.OA.C.6, CCSS 1.OA.B.4 · ★★ Medium
cozyworksheets
1Here is the mushroom, colored the right way.
3 = red5 = yellow4 = brown6 = leave white
13-7
13-7
12-6
11-8
12-9
11-8
11-5
11-5
14-8
11-5
11-8
11-8
12-7
11-8
12-9
11-8
11-8
13-7
11-8
12-9
12-9
12-9
11-8
12-9
13-8
11-8
12-9
12-9
14-9
11-8
11-8
12-9
12-9
11-8
12-9
12-9
11-8
12-9
12-9
12-9
13-8
11-8
11-8
11-8
12-9
15-9
11-5
15-9
11-7
11-7
12-8
15-9
13-7
14-8
15-9
14-8
14-8
11-7
11-7
12-8
14-8
14-8
13-7
11-5
12-6
14-8
11-7
12-8
11-7
13-7
14-8
11-5
14-8
15-9
11-7
13-9
13-9
13-9
12-8
11-5
14-8
2) 18 − 9 = 9 · 11 − 2 = 9 · 16 − 9 = 7 3) Any subtraction problem that equals 4, for example 11 − 7.
More 1st Grade worksheets Scan the code or visit cozyworksheets.com/1st-grade/. Free, with answer keys.
What age is "Subtraction Color by Number: Mushroom" for?
It is made for 1st Grade (ages 6-7). The level is ★★ medium, so it suits children who already know the basics.
How long does it take?
About 25 minutes, about the length of a short homework task or a warm-up at the start of a lesson.
Where is the answer key?
On the second page of the PDF and on this page under Show the answer key. To print for a whole class, print only the first page of the PDF.
Which standard does it practice?
Common Core 1.OA.C.6 (adding and subtracting up to 20, with quick recall of facts to 10); Common Core 1.OA.B.4 (thinking of subtraction as finding the missing part of an addition).
Can I use it in my classroom?
Yes. Print as many copies as you need for your own children or students. Please do not resell it or upload it to other websites.
Need a fresh version?The worksheet maker builds new pages with different numbers, mazes and tracing rows, plus versions A, B and C for a class.Open the worksheet maker
