Question

Write the addition problem for 275 plus 249 and find the sum. Then draw quick pictures to check your work.

Answer 1

275 +                 Checking:       524 -
249                                            249
-----------                               --------------------
524                                             275

Answer 2

  275        Here it was necessary to "carry" twice, first when we obtained 14 
+249        from adding 5 and 9, and second, when we add 7 and 4 (plus the 
--------       carry of 1).
  524