Sal shows 42 as 4 tens and 2 ones using a visual demonstration. Includes a video, transcript, and question and answer section. [4:18]

Sal uses the number 37 to explain why we use a 'ones place' and a 'tens place' when writing numbers. Includes a video, transcript, and question and answer section. [5:58]

Sal shows 25 as 2 tens and 5 ones using a visual demonstration. Includes a video, transcript, and question and answer section. [2:54]

Sal looks at the 1 in each teen number and thinks about what it really means. Includes a video, transcript, and question and answer section. [2:59]

Sal breaks the number 18 into 10 and 8 using monkeys. Includes a video, transcript, and question and answer section. [2:57]

[Free Registration/Login may be required to access all resource tools.] The video uses place value to determine the number of hundreds given a specific number of ones. The video is followed by a series of practice questions to assess...