l 5+5+5
Type Addition Statement

Build an array of 3 equal addends (2.OA.C.4):

Row 1 will be a ★ entry for 5

Row 2 will be a ★ entry for 5

Row 3 will be a ★ entry for 5

★★★★★ + ★★★★★ + ★★★★★ = 15

Add the following 3 numbers:

5 + 5 + 5

Add up the entries in blue for Column 2

 5
 5
+5
5

Column 2 →  5 + 5 + 5 = 15

Since 15 is greater than 9, we take the digit farthest to the right of our answer which is 5

We also carry the digit farthest to the left which is 1 for Column 1


Add up the entries in blue for Column 1

1
 5
 5
+5
15

We carry a value of 1 from the last step

Column 1 →  Bring down the 1 from Column 1 and we are finished


Final Answer


15