Question

There is a diagonal line crossing out a pair of units in each problem. How are the unitsrelated? Where are they located in the set-up of the solution? (HINT: Think mathematically.)

Answer 1

Part A:

1 m = 39.4 in

In the solution provided meters (m) appears both at the numerator and the denominator. Because of this similarity, one can cancel out the other.

This is just to establish that if 1m is equivalent to 39.4in, then 1.5m should be a multiple of it to convert to inches

Similarly in part B:

1L = 1.06 quarts

To change 186 quarts to liters:

186qt x 1L/1.06qt

Quarts appears on both the numerator and denominator, which makes them cancel out since they are basically the same unit