The subject wants to ask, "How many math fill-in-the-blank questions are there in the 3+ 1+2 college entrance examination in Heilongjiang Province"? Four lanes. According to the announcement issued by the Education Bureau of Heilongjiang Province, as of June 2023, there were 4 math fill-in-the-blank questions in the 3+ 1+2 college entrance examination in Heilongjiang Province, with 5 points for each question, totaling 20 points.