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Computation Algorithms: Addition
 
Objective #3: Three-digit addend plus two-digit addend.

Example

Follow these steps to solve this problem:

  1. Add the hundreds (500+0).
  2. Write 500.
  3. Add the tens (80+40).
  4. Write 120.
  5. Add the ones (3+2).
  6. Write 5.
  7. Add the partial sums (500+120+5).
  8. Write 625.
Directions: Enter the answer for each addition problem. Press tab or use the mouse to move to the next problem. When you are finished click the submit button.

1.

218
+59


2.

583
+87


3.

248
+54

           

4.

973
+68


5.

576
+34


6.

716
+69

           

7.

441
+79


8.

943
+23


9.

778
+28

           

10.

345
+32


11.

571
+29


12.

758
+54

           

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