Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem.
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Category Videos

Not Right For WatchKnowLearn
Ages: 5  9
3096 Views:

In this video, the instructor uses the software to review how to subtract numbers visually. The instructor also uses a number line. The video is suitable for elementary students. (12:32)
January 27, 2010 at 02:48 AM


Not Right For WatchKnowLearn
Ages: 3  7
2092 Views:

'What Does Addition Mean? Addition is the process of putting two or more things together and counting the total to get the sum
usually addition is represented by the symbol + . ' (11 slides; no sound) The slide show is good for visual learners.
April 7, 2010 at 09:08 PM


Not Right For WatchKnowLearn
Ages: 7  12
3572 Views:

This short video explains how to solve a word problem involving rounding and subtraction. The students in the video show the steps needed to solve the problem correctly. (01:06)
April 26, 2010 at 02:54 PM
