Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (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.

There are 6 videos in this category and 0 videos in 0 subcategories.

Category Videos
Not Right For WatchKnowLearn
Ages: 7 - 10
Subtraction 3: Introduction to Borrowing or Regrouping - Khan Academy
From YouTube, produced by Sal Khan
In this video, the instructor uses a graphics program to review how to subtract numbers and introduces how to re-group 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
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Not Right For WatchKnowLearn
Ages: 7 - 12
Adding Two-Digit Numbers Using Mental Math
From YouTube
This video teaches students to add two-digit numbers using mental math and left to right addition ( two column addition).  The problems appear on a white screen and are explained step-by-step by a math tutor. By the end of the video, students learn t... [more]
July 20, 2011 at 10:39 AM
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Not Right For WatchKnowLearn
Ages: 7 - 11
Subtraction With Regrouping
From YouTube, produced by Maths Power Learning
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)
Found by CKR11 in 1.NBT.C.6
August 15, 2009 at 10:29 AM
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Not Right For WatchKnowLearn
Ages: 8 - 12
Adding Three-Digit Numbers Using Mental Math
From YouTube
This video demonstrates addition of three-digit numbers mentally with multiples of ten.  The problem appears on a white screen, and the strategy is explained step-by-step as the problem is solved. (01:30)
July 20, 2011 at 10:54 AM
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Not Right For WatchKnowLearn
Ages: 5 - 8
Subtract Two-Digit Numbers
From eduplace.com, produced by Houghton Mifflin
Using tens and ones blocks to model numbers, students will subtract two 2-digit numbers.  Begin by subtracting the ones place then the tens place.  User clicks through the slides.
Found by tinag1974 in 1.NBT.C.6
May 20, 2010 at 02:06 PM
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Not Right For WatchKnowLearn
Ages: 6 - 12
Subtraction With Base 10 Blocks
From usu.edu, produced by Utah State University.
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... [more]
May 9, 2010 at 10:35 AM
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