About positive and negative numbers There are four numbers: 3, - 5,7, - 13. Through calculation, we can calculate 24,,,, addition, subtraction, multiplication and division, as well as brackets, as long as we can get 24. It's better to have a variety of algorithms, one of which can also

About positive and negative numbers There are four numbers: 3, - 5,7, - 13. Through calculation, we can calculate 24,,,, addition, subtraction, multiplication and division, as well as brackets, as long as we can get 24. It's better to have a variety of algorithms, one of which can also

(7+(-5)*(-13))/3=24(7+((-5)*(-13)))/3=24(7+(-13)*(-5))/3=24(7+((-13)*(-5)))/3=24((-5)*(-13)+7)/3=24(((-5)*(-13))+7)/3=24((-13)*(-5)+7)/3=24(((-13)*(-5))+7)/3=24