The first question: If you find the area of this step, you can think of it as "paving five rectangles with a length of 4 meters and a width of 0.3 meters into a big rectangle and finding the area of this big rectangle". In this way, this problem is easy to do.

4×0.3×5

= 1.2×5

=6(m？ )

A: How many square meters does the five steps cover?

Question 2: (4×0.2+4×0.3)×5

=(0.8+ 1.2)×5

=2×5

= 10(m？ )

A: At least 10 square meters of floor tiles are needed.

That should be it. I hope my answer can bring you some help. I wish you progress in your study! !