Grade 3 Unit 2 Addition & Subtraction Part 1

Unit 2 Addition & Subtraction Pt. 1

Content Emphasis/ Big Ideas

In this first unit, students extend their understanding of the base-ten numeration system and place-value concepts and apply that knowledge to multidigit addition and subtraction. Students build on their knowledge of two- and three-digit numbers and explore how those understandings extend to four-digit numbers. Students continue to build meaning for addition and subtraction through problem solving and an exploration of properties of addition

Standards:

MTH.3.1.a Read, write, and identify the place and value of each digit in a four-digit whole number, with and without models.
MTH.3.1.b Round whole numbers, 999 or less, to the nearest ten and hundred.
MTH.3.1.c Compare and order whole numbers, each 999 or less.
MTH.3.3.a Estimate and determine the sum or difference of two whole numbers.
MTH.3.3.b Create and solve single-step and multistep practical problems involving sums or differences of two whole numbers, each 999 or less.

Skills: