# Chapter 1 - Section 1.6 - Subtraction of Real Numbers - Exercise Set - Page 72: 100

You shrink your lifespan by $16$ years.

#### Work Step by Step

Getting less than 6 to 6 hours of sleeep per night takes away 1 year and smoking cigarettes takes away 15 years. Add to find the solution $-1+(-15)=-1-15=-16$

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