LI: to use the most efficient strategy to answer the question.
To answer the next question, we use a subtraction algorithm. 00.005 - 00.005 = 00.000, 7 - 1 = 6, 00.12 - 00.07 = 00.05 6 - 1 = 5, 00.16 - 00.9 = 00.7, 5 - 4 = 1, 1 - 1 = 0, 1+ 00.7 + 00.05 = 1.75 and to prove that this answer is correct, we can reverse our strategy (subtraction) to the opposite (addition). 14.975 + 1.75 = 16.725.