1.N3 Demonstrate an understanding of counting by: indicating that the last number said identifies "how many"; showing that any set has only one count; using the counting on strategy; and using parts or equal groups to count sets.
1.N9 Demonstrate an understanding of addition of numbers with answers to 20 and their corresponding subtraction facts, concretely, pictorially and symbolically by: using familiar and mathematical language to describe additive and subtractive actions from their experience; creating and solving problems in context that involve addition and subtraction; and modeling addition and subtraction using a variety of concrete and visual representations, and recording the process symbolically.
1.N10 Describe and use mental mathematics strategies (memorization not intended), such as: counting on and counting back; making 10; doubles; and using addition to subtract to determine the basic addition facts to 18 and related subtraction facts.
Use direct or indirect measurement to solve problems
1.SS1 Demonstrate an understanding of measurement as a process of comparing by: identifying attributes that can be compared; ordering objects; making statements of comparison; and filling, covering or matching.