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PARENTS please visit LumosTestPrep.com to learn more.
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Grade 4 Math - Real World Problems 1 is a free educational video by Lumos Learning.It helps students in grades 4 practice the following standards 3.NBT.A.2.
1. 3.NBT.A.2 : Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction. (A range of algorithms may be used.).