Christmas WS's!
Grade 1 mental addition worksheets
On our addition page of the grade 1 math section, we have several mental addition worksheets for students.
Add two numbers practice
Students add two single-digit numbers with sums up to 10 in these worksheets.
Add two one-digit numbers with sums up to 20
These harder worksheets have addends that may exceed 10.
Missing addends practice with sums up to 10
Next, students work on mental addition with missing addends.
Missing addends practice with sums up to 20
These harder missing addend worksheets have students work on sums up to 20.
Practice adding three numbers
These worksheets ask students to add three numbers using mental addition.
Adding whole tens
Students add whole tens in these worksheets.
Adding whole tens with missing addends
These whole ten addition worksheets have students work on missing addends.
Complete the next ten worksheets
Students complete the next ten by finding the missing number in the equation.
Adding two-digit and 1-digit numbers
These final worksheets have students add two-digit and one-digit numbers.
Activities for mental addition
If you’re looking for other ways to practice mental addition, how about trying one of the following activities?
Counting on
Start with the bigger number and count up.
Example: For 6 + 3, start with 6 and count "7, 8, 9."
Make ten strategy
Help kids learn to make 10 first, then add the remainder.
Example: For 8 + 5, think of 8 + 2 = 10, then add 3 more to get 13.
Roll and add
Roll two dice and quickly add the numbers together.
Extend by rolling three dice for advanced learners.
Number line
Use a number line to jump forward for addition.
Example: For 4 + 3, start at 4 and make three jumps forward to 7.
Math puzzles and games
Play simple addition games like bingo, card games, or online math games that emphasize speed and accuracy.
