There are various methods of subtraction. One method is to use a diagram showing what you start with, what you are taking away, and what you are left with. For example, the problem 5 - 3 might be described with this diagram: Another method to describe and aid in subtraction is to use a number line.
Unit Rates A rate is a ratio that is used to compare different kinds of quantities. A unit rate describes how many units of the first type of quantity corresponds to one unit of the second type of quantity. Some common unit rates are miles (or kilometers) per hour, cost per item, earnings per week, etc. In each case the first quantity is related to 1 unit of the second quantity. Return to Top.
The charge rate for a NiCad is right between 1.2 V and 1.45 V per cell. When charging NiCad batteries, a charge rate of c/10 (10% of capacity) is normally used, with the exceptions being speed chargers, which charge at either c/1 (100% capacity) or c/2 (50% capacity).