- If we start with [math]
300 students and subtract 60 students, how many students remain? [math]300 - 60 = students. - If we start with [math]
300 students and subtract [math]20 students three consecutive times, how many students remain? [math]300- [math] - [math] - [math] =300-3\cdot [math] = - Is one decrease of [math]
60 students the same as three decreases of [math]20 students?yes no