Subtract multiples of 10 in the range 1090 from multiples of 10 in the range 1090 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
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Category Videos

Not Right For WatchKnowLearn
Ages: 7  10
11549 Views:

In this video, the instructor uses a graphics program to review how to subtract numbers and introduces how to regroup or borrow. The instructor also uses a number line. The video is suitable for elementary students. (18:26)
January 27, 2010 at 02:51 AM


Not Right For WatchKnowLearn
Ages: 7  12
5379 Views:

This video teaches students to add twodigit numbers using mental math and left to right addition ( two column addition). The problems appear on a white screen and are explained stepbystep by a math tutor. By the end of the video, students learn t...o add four twodigit numbers. (09:39)
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July 20, 2011 at 10:39 AM


Not Right For WatchKnowLearn
Ages: 7  11
9719 Views:

This video is an interactive whiteboard presentation demonstrating how to subtract using regrouping (called trading). The video demonstrates subtracting with 10 rods and unit cubes. Very visual learning model. Sound is a bit scratchy. (03:38)
August 15, 2009 at 10:29 AM


Not Right For WatchKnowLearn
Ages: 8  12
2875 Views:

This video demonstrates addition of threedigit numbers mentally with multiples of ten. The problem appears on a white screen, and the strategy is explained stepbystep as the problem is solved. (01:30)
July 20, 2011 at 10:54 AM


Not Right For WatchKnowLearn
Ages: 5  8
3962 Views:

Using tens and ones blocks to model numbers, students will subtract two 2digit numbers. Begin by subtracting the ones place then the tens place. User clicks through the slides.
May 20, 2010 at 02:06 PM


Not Right For WatchKnowLearn
Ages: 6  12
3778 Views:

Base Blocks Subtraction – Use base ten blocks to model separation of groups in subtraction. The user can adjust the problem difficulty by changes the number of digits that appear. Please take a few seconds to wait for this virtual manipulate (that us...es a Java applet) to fully load. From Utah State University.
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May 9, 2010 at 10:35 AM
