how many in a week

Question

althea volunteers at the school library for 2 1/4 on mondays, wednesdays, and fridays. on tuesday and thursday, volunteers 1 3/4 hours. How many hours does she work in the library in a week?

Answer 1

2 1/4 + 1 3/4 + 2 1/4 + 1 3/4 + 2 1/4

8 + 1/4 + 3/4 + 1/4 + 3/4 + 1/4         add the integers

8 + 9/4                                             add fractions

8 + 2 1/4                                          convert to mixed number

10 1/4                                              combine