A scuba diver descended 10 feet, 8 feet, and 11 feet. The total number of feet can be represented using the expression |-10| + |-8| + |-11|. What is the total number of feet the scuba diver descended?
Use Math Tools Mr. Chavez spent $199.99 for a new smart phone, $39.99 on a carrying case, and $59.99 on accessories. The expression |−199.99| + |−39.99| + |−59.99| represents the total amount that Mr. Chavez spent. How much did Mr. Chavez spend altogether? Check your answer using estimation.