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Khan Academy
Khan Academy: Addition Using Groups of 10 and 100
In this exercise, students practice addition using groups of 10 and 100. Students receive immediate feedback and have the opportunity to get hints, watch a video tutorial, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2...
Homeschool Math
Homeschool Math: Finding Fractional Parts With Division
In this 4th grade lesson, students learn the connection between division and finding a fractional part of a quantity.