In this video lesson, students learn how to add two two-digit numbers vertically by breaking the numbers into 10s. The teacher explains the concept of decomposing and clarifies common misunderstandings about the order of addends.
In this video lesson, students learn how to add two two-digit numbers vertically by breaking the numbers into 10s. The teacher explains the concept of decomposing and clarifies common misunderstandings about the order of addends.