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Scholastic

Study Jams! + and - Without Regrouping

For Students 1st - 4th Standards
Addition and subtraction are essential skills for all young mathematicians. Explain the step-by-step process with respect to place value using these real-world examples. Focus is on numbers in the tens, hundreds, and thousands, making...
Interactive
PHET

Make a Ten

For Students 1st - 2nd Standards
Rate the resource as a perfect 10. Pupils use an interactive to help add and subtract numbers. They first explore how to express whole numbers using hundreds, tens, and ones, then explore how to add whole numbers by combining to make...
Interactive
Curated OER

Using the Overhead and Algebra to Correctly Guess the Number

For Students 8th - 10th
In this questing numbers worksheet, students use algebra equations to discover how the teacher correctly chooses the students' numbers each and every-time.  A pencil, key, stamp, yarn, and overhead are needed for this activity.
Interactive
Curated OER

Addition and Subtraction

For Students 1st - 4th
In this addition and subtraction worksheet, students solve simple problems where the tens and ones place value columns are labeled. Worksheet is labeled as a sample from a subscription site.
Interactive
Mangahigh

Mangahigh: Number: Add and Subtract Tens and Hundreds

For Students 4th - 6th Standards
Determine the sum and difference when adding and subtracting tens and hundreds.

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