# 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.

**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 tens.

Add the ones.

Add the partial sums to find .

**Q6: **

We can break apart numbers to add.

Add the tens.

What is ?

Now, add the ones.

Add 4 to your answer to find .

**Q7: **

How many tens are there altogether?

**Q9: **

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

Add the tens.

Add the ones.

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.