Question

jacobs puzzle has 84 pieces. Jacobs puts together 27 pieces in the morning. he puts together 38 more pieces in the afternoon. how many pieces does Jacobs need to put together to finish the puzzle

Answer 1

27 + 38 = 65 

84 - 65 = 19

Answer 2

First you add what he already used: 27+38 and that is 65. Now you subtract that from what he originally had: 84-65=19