Expanded form and Place Value of Three-digit Numerals
The second graders are breaking three digit numbers into hundreds, tens, and ones. They break the number apart into the value of each digit writing this as an addition problem. They then put the number back together to get the three digit number it is equal to. This proves difficult for some students, especially when there is a zero in the number. The students must also construct a three digit number based on the place value blocks shown. As long as the students remember that the flats (squares) are hundreds, longs or rods are tens and the small circles or cubes are ones they do well at writing the number shown by the place value blocks shown. Saying or reading the number correctly may also be a struggle. Have your child practice saying three digit numbers so they become familiar with how to read or say the number.
I have listed a few You Tube videos and some websites that may help your child if he or she is struggling with this concept. Please use them as an additional resource.
https://www.youtube.com/watch?v=gouM6qaRsJ8
https://www.youtube.com/watch?v=sg2xZW41arE
https://www.youtube.com/watch?v=HuiYOLPOzEk
https://www.splashlearn.com/math/3-digit-numbers-in-expanded-form-games
https://wordwall.net/en-us/community/3-digit-number-expanded-form