Benchmark 2A: The Nature of Mathematics - Patterns and Relationships
(grades 6-8, page 28)
 

Usually there is no right way to solve a mathematical problem; different methods have different advantages and disadvantages. (1 of 2)

Standard 1-3 page 75, Grades 5-8
Develop and apply a variety of strategies to solve problems, with emphasis on multi-step and non-routine problems

Logical connections can be found between different parts of mathematics. (2 of 2)

Standard 4-1 page 84, Grades 5-8
See mathematics as an integrated whole