From Peak to Pivot: Understanding the Shift from 9.1% to 2.7%
Reviewing from Section 9.1 down to 2.7 is a "spiral review"—testing if you remember the oldest material (Chapter 2) just as well as the newest material (Chapter 9). 9.1 - 2.7
To begin the subtraction process, you must write the numbers vertically. It is critical to rather than the digits themselves; this ensures that you are subtracting tenths from tenths and ones from ones. From Peak to Pivot: Understanding the Shift from 9