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Understanding Place value

Understanding Place value

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Author: Alondra Hernandez
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CCSS.MATH.1.2. 

Students will understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as
special cases:
a. 10 can be thought of as a bundle of ten ones—called a “ten.”
b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens
(and 0 ones).

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