Exam 1: Addition of Whole Numbers

In the number 3,567,890, the digit 9 is in the hundreds place.

If one technician earns $21 per hour and a second technician earns $18 per hour, what are the total hourly labor costs for both workers?

When adding whole numbers, line the units places of each number underneath each other.

Add the following numbers to obtain the correct sum. 2,377 + 512 + 1,893 + 384 =

Add the following numbers to obtain the correct sum: 8,519 2,221 654 $\underline {+ \quad9}$

An air-conditioning shop orders the following amounts of refrigerant: 115 pounds of R-134a, 157 pounds of R-125, 65 pounds of R-124, 95 pounds of R-32, and 90 pounds of R-152a. What is the total weight in pounds of refrigerant ordered?

In one year, the Hudson Refrigerator Company's five repair trucks covered 8,107 miles; 6,977 miles; 5,487 miles; 6,003 miles; and 7,201 miles. What is the total mileage the Hudson Refrigerator Company recorded for the year?

Add the following numbers to obtain the correct sum. 983 + 351 =

In one month, a technician woks 37 hours, 41 hours, 39 hours, and 43 hours. What is the total number of hours the technician works?

Add the following numbers to obtain the correct sum: 678 meters 496 meters 332 meters +17 meters