New York State Core Curriculum: Subject: Mathematics Level: Grade 3-4 Key Idea or Concept 1: Students use mathematical reasoning to analyze mathematical situations, make conjectures, gather evidence, and construct an argument. Performance Indicator or Area 1B: Use patterns and relationships to analyze mathematical situations. Major Understanding: Understanding the relationship between money and decimals. Key Idea or Concept 2: Students use number sense and numeration to develop an understanding of the multiple uses of numbers in the real world, the use of numbers to communicate mathematically, and the use of numbers in the development of mathematical situations. Performance Indicator or Area 2A: Use the whole numbers and fractions to identify locations, quantify groups of objects, and measure distance. Performance Indicator or Area 2C: Relate counting to grouping and to place value. Major Understanding: Understanding the use of decimals in the child�s daily life. Major Understanding: Understanding decimals to the hundredths place value. Key Idea or Concept 3: Students use mathematical operations and relationships among them to understand mathematics. Performance Indicator or Area 3A. Add, subtract, and multiply whole numbers Key Idea or Concept 6: Students use ideas of uncertainty to illustrate that mathematics involves more than exactness when dealing with everyday situations. Performance Indicator or Area 6B: Make estimates to compare actual results of computations. Major Understanding: Understanding estimation in everyday situations, such as grocery budgeting. Major Understanding: Understanding the relationships between estimated and actual costs.