Numbers

2-33 Two-Digit Addition with Regrouping

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When adding two digit numbers, you may need to regroup.

For example;

26 + 48 = 74.  When adding the 8 and 6, the sum is 14.

You need to regroup 14 ONES as 1 TEN and 4 ONES.

Place the one TEN in the TENS column and add the TENS place values. 

Review the boxes below.

 

 
 
Tens Ones
spacer.gif (42 bytes)
2 6
4 8
+_______
spacer.gif (42 bytes)  
 Step 1
 
Tens Ones
spacer.gif (42 bytes)
2 6
4 8
+_______
14
 Step 2
 
Tens Ones
1
2 6
4 8
+_______
4
 Step 3
 
Tens Ones
1
2 6
4 8
+_______
7 4

 

Add the numbers in the problems below:

 

 Step 1
 
Tens Ones
spacer.gif (42 bytes)
2

5

3 7
+_______
 Step 2
 
Tens Ones
1
2 5
3 7
+_______
 
 
Tens Ones
5 4
3 9
+_______
9
 
 
Tens Ones
1 6
4 8
+_______
4
spacer.gif (42 bytes)
 
Tens Ones
2 7
3 7
+_______
6
 
Tens Ones
4 2
4 8
+_______
 
Tens Ones
1 8
5 7
+_______
 
Tens Ones
3 6
5 6
+_______
spacer.gif (42 bytes)
 
Tens Ones
2 6
4 7
+_______
 
Tens Ones
1 7
7 4
+_______
 
Tens Ones
3 6
5 4
+_______
 
Tens Ones
3 4
5 8
+_______
spacer.gif (42 bytes)
 
2 1
4 9
+_______
 
2 2
6 8
+_______
 
2 6
6 9
+_______
 
1 6
7 6
+_______

 

 

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