-If 2xmy6 and 35x3y2n are of the same kind, then M + n=______ ．

-If 2xmy6 and 35x3y2n are of the same kind, then M + n=______ ．

If - 2xmy6 and 35x3y2n are of the same kind, then M = 3; 2n = 6, n = 3. Then M + n = 6

Write a similar term of - 5x3y2______ Its number is______ ．

According to the definition of similar terms, - 5x3y2 contains two letters XY, the exponent is 3 and 2 respectively, and their times are 5. Therefore, a monomial only contains the letter XY, and the exponent is 3 and 2 respectively, which meets the requirements, such as - x3y2 and so on

If the m-square of the square y of the monomial - 3x is the same as the cube of one third of the n-square y, then what is M-N?

From the similar terms, we can get: n = 2, M = 3, M-N = 1