Add and subtract within 1000, 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. Understand that in adding or subtracting threedigit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
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Ages: 7  10
7781 Views:

Sometimes when you add, you have to regroup, or carry, a group of tens. That is why you need to line up your math problems like a pro. Learn more about addition and regrouping with this stepbystep, interactive link from StudyJams. A short, self...checking quiz is also included.
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June 18, 2011 at 10:32 PM


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Ages: 7  10
5478 Views:

Addition is really about finding sums, or totals. Subtraction is about finding the difference between two numbers. Learn more about adding and subtracting without regrouping with this stepbystep, interactive video from StudyJams. A short, selfc...hecking quiz is also included with the link.
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June 18, 2011 at 10:40 PM


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Ages: 8  12
8212 Views:

Students will learn different strategies to determine the product of a multiplication problem. Skip counting on a number line, drawing a picture, drawing an array and writing a multiplication sentence are different strategies for finding the product.... User clicks through the slides.
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May 20, 2010 at 04:12 PM


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Ages: 7  10
8158 Views:

To find the difference between two numbers, sometimes you have to regroup, or borrow, from another number. Learn how to subtract using regrouping with this stepbystep, interactive video from StudyJams. A short, selfchecking quiz is also included... with this link.
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June 18, 2011 at 10:42 PM


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Ages: 7  12
5006 Views:

In this video, the instructor uses the Paint Program to review how to add numbers. He starts with singledigit numbers, moves into twodigit and fourdigit numbers, and reviews place value. (08:57)
January 27, 2010 at 02:32 AM


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Ages: 7  10
11472 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


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Ages: 6  11
11567 Views:

In this computeranimated video, students are taught to add two digit numbers using regrouping. Students are also shown a strategy for adding twodigit and onedigit numbers using mental math. (03:23)
November 28, 2010 at 06:55 PM


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Ages: 6  10
5242 Views:

Students will learn to use addition (the opposite of subtraction) to check the difference. If the sum of the addition problem equals the number you subtracted from, then the answer is correct. User clicks through the slides. Uses metacognitive stra...tegies.
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May 20, 2010 at 03:31 PM


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Ages: 7  12
3322 Views:

Using problemsolving strategies understand, plan, solve and look back, students will make change from an amount given to them. Starting from the cost of the item, count coins and bills until you reach the amount paid. Then count coins and bills t...o find the amount of change. Uses metacognitive strategies. User clicks through the slides.
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May 20, 2010 at 03:53 PM


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Ages: 7  12
5342 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
