500
Jana is using a scale to find the mass of a tape dispenser, a notebook, and an iPad. The tape dispenser weighs 0.45 pounds. The iPad weighs 1.54 pounds. If the combined mass of all three objects is 2.66 pounds, what is the mass of the notebook?
0.45 + 1.54 = 1.99 pounds
2.66 - 1.54 = 0.67 pounds
0.67 pounds