Using the base-ten blocks, a THOUSAND blocks make a cube. One HUNDRED is a "flat", a TEN is a "stick", and one little block is a UNIT or ONE. We see several numbers with four digits made with these blocks, and write them as numerals.
The first part of this lesson is here:
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See more videos for 3rd grade math:
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Math Mammoth Grade 3 Curriculum:
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Workbook about 4-digit place value:
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