Grade 2 Unit 2: Working with Base 10

Students will use arrow cards and other tools to build a deeper understanding of place value in order to compare whole numbers, and addand subtract. Georgia K-12 Mathematics Standards: 2.NR.1: Using the place value structure, explore the count sequences to represent, read, write, and compare numerical values to 1000 and describe basic place-value relationships and structures. Expectation(s): 2.NR.1.3 Represent, compare, and order whole numbers to 1000 with an emphasis on place value and equality. Use >, =, and < symbols to record the results of comparisons. 2.NR.2: Apply multiple part-whole strategies, properties of operations and place value understanding to solve real-life, mathematical problems involving addition and subtraction within 1,000. 2.NR.2.2 Find 10 more or 10 less than a given three-digit number and find 100 more or 100 less than a given three-digit number. 2.NR.2.3 Solve problems involving the addition and subtraction of two-digit numbers using part-whole strategies. 2.NR.2.4 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

By Michael Wiernicki