Two-Digit Addition
Using Expanded Notation to Add
Krista Titchener- Fisher Elementary
You can add two-digit numbers by
using expanded notation!
25 +37= ___
Go to the next page to see how to solve
it using expanded notation!
Break the numbers up in tens and ones using
expanded notation .
25 + 37 is the same as….
1. Add the tens
3. Now add both
numbers together!
20 + 5
30 + 7
2. Then add the ones
50 + 12 = 62
Now it’s your turn to try it!
Get your dry erase boards
ready.
Here we go!
Write this number sentence at the top
of your dry erase board:
44 +26= ___
Go to the next page to see how to solve
it using expanded notation!
Break the numbers up in tens and ones using
expanded notation .
44 + 26 is the same as….
1. Add the tens
3. Now add both
numbers together!
40 + 4
20 + 6
2. Then add the ones
60 + 10 = 70
Let’s try another one!
Write this number sentence at the top of your
dry erase board:
16 +78= ___
Go to the next page to see how to solve
it using expanded notation!
Break the numbers up in tens and ones using
expanded notation .
16 + 78 is the same as….
1. Add the tens
3. Now add both
numbers together!
10 + 6
70 + 8
2. Then add the ones
80 + 14 = 94
Let’s try another one!
Write this number sentence at the top of your
dry erase board:
63 +19= ___
Go to the next page to see how to solve
it using expanded notation!
Break the numbers up in tens and ones using
expanded notation .
63 + 19 is the same as….
1. Add the tens
3. Now add both
numbers together!
60 + 3
10 + 9
2. Then add the ones
70 + 12 = 82
Let’s try another one!
Write this number sentence at the top of your
dry erase board:
17 +18= ___
Go to the next page to see how to solve
it using expanded notation!
Break the numbers up in tens and ones using
expanded notation .
17 + 18 is the same as….
1. Add the tens
3. Now add both
numbers together!
10 + 7
10 + 8
2. Then add the ones
20 + 15 = 35
Let’s try another one!
Write this number sentence at the top of your
dry erase board:
62 +29= ___
Go to the next page to see how to solve
it using expanded notation!
Break the numbers up in tens and ones using
expanded notation .
62 + 29 is the same as….
1. Add the tens
3. Now add both
numbers together!
60 + 2
20 + 9
2. Then add the ones
80 + 11 = 91
Let’s try another one!
Write this number sentence at the top of your
dry erase board:
48 +33= ___
Go to the next page to see how to solve
it using expanded notation!
Break the numbers up in tens and ones using
expanded notation .
48 + 33 is the same as….
1. Add the tens
3. Now add both
numbers together!
40 + 8
30 + 3
2. Then add the ones
70 + 11 = 81
You did a great job! Way to go!