100 questions on the addition and subtraction of integral in the first day of junior high school There should be numbers, letters, equations

100 questions on the addition and subtraction of integral in the first day of junior high school There should be numbers, letters, equations

456156.33412.824.4563123.456854.323676.231.79+23.456123.453451.432.423453.14265.312.69453.23.4763456.3423.7563.123.3456342.1.3464.345.45454545546345645456384634535863453.4545348633563456354636354365+5...