# Lesson Worksheet: Adding Ones to Two-Digit Numbers without Regrouping Mathematics • 1st Grade

In this worksheet, we will practice adding a one-digit number to a two-digit number without crossing a ten and model this with place value equipment.

Q1:

There are 20 people in a swimming pool. If two more jump in, how many people will be there in the swimming pool?

Q2:

There are 34 students playing in the park. Anthony, David, and Daniel decided to join them. Find the total number of students.

Q3:

Is , or ?

• A
• B
• C

Q4:

Find the sum.

Hint: Add the ones then the tens. Q5:

Complete the following: .

Q6:

There should be the same number of blocks on each side of the equal sign. How many blocks should be in the empty square? Q7:

Pick the model that shows the result of .

• A • B • C Q8:

Find the missing number in the following:

Q9:

Look at the model to find . Q10:

Find 43 plus 4. Q11:

Find the missing number to make the equation correct. Q12:

Calculate . Q13:

On a computer game, Mia scored 64. Jackson scored 4 more than Mia. What was Jackson’s score?