The topic is that the length of a basketball court is 28 meters, and Xiaoming's stride is 1.5 meters. How many steps does Xiaoming need to take from the bottom line of the basketball court to the free throw line? Analysis is how many steps Xiao Ming needs to take from the bottom line of the basketball court to the free throw line according to the known information. We know that the length of the basketball court is 28 meters, and Xiaoming's stride is 1.5 meters.

We need to calculate the distance from the free throw line to the bottom line of the basketball court. We know that the length of the basketball court is 28 meters, and the distance from the penalty line to the center line of the court is 1.5 meters, so the distance from the penalty line to the bottom line of the basketball court is also 1.5 meters.

We need to calculate the number of steps that Xiaoming needs to take from the bottom line of the basketball court to the free throw line. We know that Xiao Ming's stride is 1.5m, so it takes 1.5m× 2 = 3m to get from the bottom line of the basketball court to the penalty line. Xiao Ming needs to take two big steps for every step, so he needs to walk 3m ÷1.5m/step× 2 from the bottom line of the basketball court to the penalty line. Xiaoming needs four steps to walk from the bottom line of the basketball court to the free throw line.

How to calculate the distance:

1. Direct measurement: For some regular geometric figures, such as straight lines, rectangles, squares, etc. We can calculate the distance by measuring directly with a measuring tool. For example, a tape measure is used to measure the length of a straight line and a caliper is used to measure the diameter of a circle.

2. Step size multiplied by the number of steps: When we can't measure the distance directly, we can take the step measurement method. That is, measure the length of one step first, then count the steps and multiply them to get the total distance. Step size can be calculated by taking 100 meters, counting the number of steps, and then calculating the length of each step.

3. Product of time and speed: If the speed and moving time of the object are known, then the moving distance of the object can be calculated. For example, if a car travels at 60 kilometers per hour 1 hour, the distance it travels is 60 kilometers. In practical application, we can choose the most suitable method to calculate according to the actual situation.