1. Move the vertical bar on the mathematical symbol "+"of matches, and the "+"will become "-"; Move the match to 1 with the match number 17, and the number 17 will become "77". 77-7=70, and the formula holds. The chart is as follows:
2. Move any one of the mathematical symbols "=" by 90 degrees, change the number "=" into the number "+",and the addition formula "17+7+70" is established. The chart is as follows:
3. Move the mathematical symbol "+"of matches vertically, and put the moved matches on the symbol "=" obliquely, so that the symbol "=" becomes "≦", and get an inequality formula of "17-7≠70". The chart is as follows:
Extended data
Similar question: 17+7= 10, if only one match is moved, how can the equation be established?
There are two ways to move, and the analysis is as follows:
1. Move the matching number "17" horizontally, and the matching number "17" becomes the number "1 1". Put the moved match on the zero of the number "10" to get the number "65438"
2. Move the number "7" horizontally and the number "7" becomes the number "1". Put the moved match on the zero of the number "10", so that the number "10" becomes the number "18", and the equation becomes: