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: For Halloween Katie and her sister combined the candy they received . Katie had 8 pieces of candy while her sister had 23 . If they ate 8 pieces the first night , how many pieces do they have left ?

SOLUTION: 23

PROBLEM: A waiter had 9 tables he was waiting on , with 7 women and 3 men at each table . How many customers total did the waiter have ?

SOLUTION:
90