EAST LANSING, Mich., Dec. 18 (UPI) -- Children as young as 3 years old can grasp large numbers and may be ready for more direct math instruction when they enter school, U.S. researchers say. The ...
Read, write, & compare multi-digit numbers using symbols including expanded form. Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two ...
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