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Khan Academy

Khan Academy: Math: 3rd Grade: Understand Multiplication Using Groups of Objects

For Students 3rd Standards
Math practice exercise on using arrays and repeated addition to visualize multiplication.
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Khan Academy

Khan Academy: Meaning of Multiplication

For Students 2nd - 4th Standards
Practice representing multiplication as equal groups, repeated addition, or arrays. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. Video content is available for...
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Other

2nd Grade Worksheets: Common Core State Standard 2.oa.4

For Teachers 2nd Standards
A collection of four worksheet sets that address the Common Core State Standard 2.OA.4.