Tom's home is 1,800m from his school. One morning he walked part of the way to school and then ran the rest. If it took him 20 minutes or less to get to school, and he walks at 70 m/mins and runs 210 m/min, how far did he run?
If the distance he ran is x m, the distance he walked is (__________) m. Therefore,
If the distance he ran is x m, the distance he walked is (__________) m. Therefore,