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.
Read each problem. Write the equation and the answer.
Write the missing number.
Count the snowflakes and the snowmen. Write the addition.
Circle the problem with the bigger answer. ★
Skills practiced
This winter review brings together the main first grade operations skills on one page. Your child solves nine addition and subtraction facts within 20, two short word problems about snowflakes and snowballs, three equations with a missing number, and a picture sum of snowflakes and snowmen, then compares two expressions. Mixing addition and subtraction makes your child read each sign instead of repeating one operation, and the missing number problems show how the two operations are connected.
Common Core 1.OA.C.6: Adding and subtracting up to 20, with quick recall of facts to 10
Common Core 1.OA.D.8: Finding the missing number in a simple addition or subtraction sentence
Common Core 1.OA.A.1: Solving story problems up to 20 that join, separate, or compare amounts
Your child reads the instruction out loud and explains in their own words what to do.
Work through the tasks in order: the first ones are easier and warm up for the next.
The task with a star is optional, for early finishers.
Check together with the answer key and redo only what was wrong.
Tips for parents and teachers
Ask your child to circle the plus or minus sign in each fact before solving it; that tiny habit prevents most mix-ups on mixed pages. For the missing numbers, turn them into questions: 6 and what make 13? If your child gets stuck on 17 − 8, suggest thinking of a double: 8 + 8 = 16, so 8 + 9 = 17, and 17 − 8 = 9. Let your child use a number line if needed.
Make it easier or harder
Easier: Do the facts and the word problems on one day and the rest on another, keeping a number line from 0 to 20 on the table.
Harder: Ask your child to write a winter word problem for 12 − 5, or to explain in words how they solved the missing number problems.
What age is "Winter Math: Add and Subtract to 20" 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.D.8 (finding the missing number in a simple addition or subtraction sentence); Common Core 1.OA.A.1 (solving story problems up to 20 that join, separate, or compare amounts).
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
