# Worksheet: Adding by Breaking Apart Tens and Ones

In this worksheet, we will practice adding a 2-digit number to a 2-digit number by breaking the numbers apart and adding ones then tens.

Q1:

We can break apart numbers into tens and ones to add. What is ?

What is ?

Add the sums to find .

Q2:

Break apart the numbers into tens and ones to add. Q3: Q4:

We can break apart numbers into tens and ones to add.

Follow the steps to find . First, add the 2 tens to 35. Then, add on the 4 ones. Q5:

Sophia wants to solve this problem. Help her use partial sums to find the total.  Add the partial sums to find .

Q6:

We can break apart numbers to add. What is ?

Q7:

How many tens are there altogether? Q8:

How many tens are there altogether? Q9:

We can break apart numbers into tens and ones to add.   Add the sums to find .

Q10:

Break apart 31 into tens and ones to find the sum. Q11:

Look at how Michael added tens and ones. Use his method to find the missing numbers: .

• A6, 2, 62
• B6, 12, 62
• C7, 2, 72
• D7, 2, 70

Q12:

Find the result of by adding the tens together and then the ones.

Q13:

We can use place value to add two-digit numbers quickly. Find the answer for by adding the tens together and then the ones.

Q14:

Benjamin has 42 marbles and his father gifted him 24 more marbles. Now Benjamin has marbles. Find the number of marbles by adding the tens together and then the ones.