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.

Add the tens.

What is 40+10?

Add the ones.

What is 3+6?

Add the sums to find 43+16.

Q2:

Break apart the numbers into tens and ones to add.

Q3:

Use the picture to help you complete the number sentence: 52+32=.

Q4:

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

Follow the steps to find 35+24.

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 23+48.

Q6:

We can break apart numbers to add.

Add the tens.

What is 57+20?

Now, add the ones.

Add 4 to your answer to find 57+24.

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 tens.

Add the ones.

Add the sums to find 35+23.

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: 6+12=+=tensonestensones.

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

Q12:

Find the result of 26+31 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 33+49 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 42+24 marbles. Find the number of marbles by adding the tens together and then the ones.

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