Subtracting 10 or 100 Mentally Using Base 10 Blocks

This lesson teaches how to mentally subtract 10 or 100 from a three-digit number using base 10 blocks. It explains the concept of place value and how each digit in a number represents different values. The lesson includes visualizing numbers with base 10 blocks and demonstrates subtraction by removing blocks from the hundreds or tens place, showing that the other places remain unchanged. By the end, students will understand how to perform these subtractions mentally by visualizing the changes in the base 10 blocks.

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