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Use Q-tips and paint for this fun activity to practice identifying numbers based on the groups of tens required to make each decade number.
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).
10 can be thought of as a bundle of ten ones - called a “ten.”
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: