You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[EX Q]: Carlos has 58 blocks . He gives 21 to Rachel . How many blocks will Carlos have ?
[EX A]: 37

[EX Q]: Karin 's science class weighed plastic rings for an experiment . They found that the orange ring weighed 0.08333333333333333 ounce , the purple ring weighed 0.3333333333333333 ounce , and the white ring weighed 0.4166666666666667 ounce . What was the total weight of the plastic rings ?
[EX A]: 0.8333333333333334

[EX Q]: A vase can hold 5 flowers . If you had 6 carnations and 19 roses , how many vases would you need to hold the flowers ?
[EX A]:
5