This resource is part of a 4 lesson module. Topic A-D. This resource includes the overview, lesson plans assessments and activities. The resource is from EngageNY and shared through the Creative CommonsAttribution-NonCommercial-ShareAlike 3.0 United States (CC BY-NC-SA 3.0 US): http://creativecommons.org/licenses/by-nc-sa/3.0/us. Aligned to CCSS: 2.NBT.7, 2.NBT.8,
2.NBT.9, 1.OA.3, 1.OA.4, 2.NBT.1, 2.NBT.2, 2.NBT.3, 2.NBT.5, MP.3, MP.5, MP.6, MP.8.
Addition and Subtraction: Word Problems
Subject
Math — Operations and Algebraic Thinking
Grade Level
Grades K-2
Resource Type
Lesson Plan
Standards Alignment
Common Core State Standards
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Standards
Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
Explain why addition and subtraction strategies work, using place value and the properties of operations.
Apply properties of operations as strategies to add and subtract.
Understand subtraction as an unknown-addend problem.
Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
Count within 1000; skip-count by 5s, 10s, and 100s.
Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
This is an excellent set of lesson plans. Well done, thank you for sharing.
AprilD100
October 30, 2014
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