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 3+60<, = or >6+30?

  • A<
  • B>
  • C=

Q4:

Find the sum.

Hint: Add the ones then the tens.

Q5:

Complete the following: =8+90.

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 33+4.

  • A
  • B
  • C

Q8:

Find the missing number in the following: 45+3

Q9:

Look at the model to find 25+4.

Q10:

Find 43 plus 4.

Q11:

Find the missing number to make the equation correct.

Q12:

Calculate 36+3.

Q13:

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

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