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Mastering addition is the very first step toward mathematical literacy! Did you know that early civilizations, like the Egyptians, ...
844,440 views
11 months ago
0:00 Intro 0:10 Category 1: Addition & Subtraction 2:33 Category 2: Place Value & Number Sense 4:20 Category 3: Time & Money ...
22,660 views
1 year ago
