Alaska Content and Performance Standards
AK.1.NBT. Number and Operations in Base Ten
Understand place value.
1.NBT.2. Model and identify place value positions of two digit numbers. Include:
1.NBT.2.a. 10 can be thought of as a bundle of ten ones, called a "ten".
1.NBT.2.b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight or nine ones.
1.NBT.2.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).