Numbers

2-37 Adding Three Numbers

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To find the sum of 3 two-digit numbers, you need to first add the ones place value. Then add the tens place value.

 

Find the sum.

Tens Ones
spacer.gif (42 bytes)
1 3
5 4
2 7
+________
spacer.gif (42 bytes)

 

Add the ones.  Regroup!

Tens Ones
spacer.gif (42 bytes)
1 3
5 4
2 7
+________
14

Add the tens.

Tens Ones
1
1 3
5 4
2 7
+________
9 4

 

Complete the problems below.

Add the ones.

Tens Ones
spacer.gif (42 bytes)
3 5
1 4
4 7
+________

Regroup!

Tens Ones
3 5
1 4
4 7
+________
6

Add the tens.

Tens Ones
1
3 5
1 4
4 7
+________
6

 

 
Tens Ones
1
1 3
2 6
3 7
+________
6
 
Tens Ones
1 5
2 3
3 9
+________
7
 
Tens Ones
1 3
3 8
4 4
+________
 
Tens Ones
1 7
2 3
3 4
+________
spacer.gif (42 bytes)      
 
Tens Ones
1 6
1 7
5 2
+________
 
Tens Ones
1 3
2 2
4 4
+________
 
Tens Ones
1 2
1 4
3 9
+________
 
Tens Ones
1 5
2 1
3 2
+________
 spacer.gif (42 bytes)      
 
Tens Ones
2 2
3 3
3 8
+________
 
Tens Ones
1 4
3 5
4 7
+________
 
Tens Ones
1 1
4 8
3 9
+________
 
Tens Ones
2 9
2 7
2 1
+________
spacer.gif (42 bytes)
 
1 7
1 9
2 0
+________
 
1 2
1 3
2 4
+________
 
1 6
2 6
3 7
+________
 
1 3
3 8
4 5
+________

 

 

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