Common Core: Number & Operations in Base Ten

1.NBT.B2

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

October 1, 2018
1.NBT.A1

Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.

October 1, 2018
K.NBT.A1

Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (such as 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, … Read More “K.NBT.A1”

October 1, 2018