Summary: 2700006, written as 270006, has 2.7 million. Multi-digit reading should be from high to low, level by level; When reading 100 million and 10,000 levels, read according to the reading method of each level, just add the word "100 million" or "10,000" at the end of each level, no matter how many zeros there are, don't read, and other numbers have one or several zeros in succession.

Math:

Mathematics is a subject that studies concepts such as quantity, structure, change, space and information. Mathematics is a universal means for human beings to strictly describe the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence. In this sense, mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics.