Interesting elementary school math problems

The first problem is to change 6 into 9 and move a match.

Secondly, I think there are 12 different painting methods (yellow red yellow green *4+ red yellow red green *4+ green red green yellow * 4+ yellow green yellow red * 4+ green red yellow * 4+green yellow red *4)/2= 12 (species).

Solve! ! ! ! ! ! ! ! ! ! ! Reading and writing numbers in the first grade of primary school

What principles should be followed in the compilation of fill-in-the-blank questions in primary school mathematics

Qixia mathematics diandian

The most complicated mathematical formula

Where to check the average score of mathematics in Zhejiang college entrance examination

Seven answers to the math workbook [2] 4.4

Where is the video of junior high school math lecture?

The final examination paper of mathematics in the second volume of the first grade of primary school

What movie was Hipatia, the first female mathematician and astronomer in the world?

The help of picture books to mathematics