1.OA.D.8

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.

There are 11 videos in this category and 0 videos in 0 subcategories.

Category Videos
Not Right For WatchKnowLearn
Ages: 9 - 16
2801 Views:
Subtracting Negative Numbers
From YouTube, produced by Lawrence Perez, Candice Jhu
In this video the instructors subtract negative numbers. They start with addition using a number line they show how to subtract negative numbers. They show this with a few examples. Then they move onto subtracting a negative number. They do some exam... [more]
Found by Barb in 1.OA.D.8
July 31, 2009 at 03:45 PM
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Not Right For WatchKnowLearn
Ages: 8 - 16
3598 Views:
Subtraction on a Number Line
From YouTube, produced by MuchoMath
This video indicates it is for pre-algebra, however this would be good for anyone who is reviewing subtraction. In this video they show how to subtract using the number line, this includes negative numbers. They do this using many different examples.... [more]
Found by Barb in 1.OA.D.8
July 31, 2009 at 08:44 AM
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Not Right For WatchKnowLearn
Ages: 8 - 14
3252 Views:
Addition Techniques
From YouTube, produced by Lawrence Perez
This video indicates it is for pre-algebra, however this would be good for anyone who is reviewing or learning place value. This video has humor, which helps make the lesson fun. Video shows how to use the number line, shows how to use the number lin... [more]
Found by Barb in 1.OA.D.8
July 31, 2009 at 08:00 AM
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Not Right For WatchKnowLearn
Ages: 5 - 11
2281 Views:
Circle 0 - A Virtual Manipulative
From usu.edu, produced by Utah State University
The goal of this puzzle is to put three numbers inside of each circle so that they add up to 0. Solve the puzzle by dragging the black numbers to the blank spaces. You cannot move the blue numbers. When the three numbers inside any circle add up to ... [more]
May 15, 2010 at 07:29 PM
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Not Right For WatchKnowLearn
Ages: 7 - 12
2119 Views:
Circle 21 - A Virtual Manipulative
From usu.edu, produced by Utah State University
The goal of this puzzle is to put three numbers inside of each circle so that they add up to 21. Solve the puzzle by dragging the black numbers to the blank spaces. You cannot move the blue numbers. When the three numbers inside any circle add up to... [more]
May 15, 2010 at 08:07 PM
  • Favorites

Not Right For WatchKnowLearn
Ages: 5 - 10
3357 Views:
Basic Subtraction - Khan Academy
From YouTube, produced by Salman Khan
Begins with a review of addition (in simple terms) with visual support. Number line is also used to demonstrate principles. (08:32)
April 3, 2009 at 01:34 AM
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Not Right For WatchKnowLearn
Ages: 6 - 8
2270 Views:
Math Counting Song- Adding 5 + 5 (Pennies in my Pocket)
From YouTube, produced by Mr. R.
Mr. R.'s math song about addition fact 5 + 5. (02:29)
Found by raknyc in 1.OA.D.8
May 19, 2010 at 08:01 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 5 - 8
2351 Views:
counting song- adding 5 + 5 (five bees)
From YouTube, produced by Mr. R.
Mr. R.'s salsa math song about adding double number fact, 5 + 5 = 10 and counting in English and Spanish. See more math resources at http://mathstory.com/
Found by raknyc in 1.OA.D.8
May 19, 2010 at 08:07 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 8 - 14
3088 Views:
Subtracting Numbers on a Number Line
From YouTube, produced by Lawrence Perez/Candice Jhu
The instructor uses humor to demonstrate how to subtract numbers on a number line. The video features a dual screen, and sometimes a three-part screen for demonstration. (06:23)
March 18, 2010 at 08:40 PM
  • Favorites

Not Right For WatchKnowLearn
Ages: 8 - 11
2715 Views:
Column Substraction and Problem Solving With Subtraction
From discoveryeducation.com, produced by Discovery Education
Using one-, two-, and three-digit numbers, students learn how to subtract numbers without borrowing in columns. They use their knowledge of number families to find the missing numbers in tables using addition and subtraction. Finally, students lear... [more]
Found by grazianione in 1.OA.D.8
June 2, 2010 at 12:17 PM
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