TASK DEFINITION: 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.
PROBLEM: Roadster 's Paving Company used 10 tons of cement to pave Lexi 's street and 5.1 tons of cement to pave Tess 's street . How much cement did Roadster 's Paving Company use in all ?

SOLUTION: 15.1

PROBLEM: There are 54 scissors in the drawer . Keith placed 22 more scissors in the drawer . How many scissors are now there in all ?

SOLUTION: 76

PROBLEM: A construction company ordered 0.16666666666666666 ton of concrete , 0.16666666666666666 ton of bricks , and 0.5 ton of stone . How many tons of material did the company order in all ?

SOLUTION:
0.8333333333333334