standard_description: Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
- The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
- 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.”
problem_activity: The first number in a pattern is 5. The pattern rule is to add 6.
a.   Fill in the blanks below to write up to the seventh term in the pattern.
5, ___, ___, ___, ___, ___, ___
b.   Why are all of the numbers in the pattern in Part (a) odd?


aligns: no