Second Grade Unit 3
Stickers, Number Strings & Story Problems
(Place Value/Add & Subtract within 100 (emphasis within 20 for T1)
Duration: 5 Weeks
September 18  October 17
Math Expressions  Unit 2: Addition and Subtraction within 200


Valley 2nd Grade Trimester Standards
Operations and Algebraic Thinking
Represent and solve problems involving addition and subtraction.
CCSS.MATH.CONTENT.2.OA.A.1
Use addition and subtraction within 100 to solve one and twostep word problems (we are focusing in within 20 for T1) involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.1
Add and subtract within 20.
CCSS.MATH.CONTENT.2.OA.B.2
Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two onedigit numbers.
Number and Operations in Base Ten
Use place value understanding and properties of operations to add and subtract
CCSS.MATH.CONTENT.2.NBT.B.6
7.1 Use estimation strategies to make reasonable estimates in problem solving. CA
Represent and solve problems involving addition and subtraction.
CCSS.MATH.CONTENT.2.OA.A.1
Use addition and subtraction within 100 to solve one and twostep word problems (we are focusing in within 20 for T1) involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.1
Add and subtract within 20.
CCSS.MATH.CONTENT.2.OA.B.2
Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two onedigit numbers.
Number and Operations in Base Ten
Use place value understanding and properties of operations to add and subtract
CCSS.MATH.CONTENT.2.NBT.B.6
 Add up to four singledigit numbers using strategies based on place value and properties of operations (in T2 this becomes four doubledigit numbers)
 Mentally add or subtract 10 to a given number 1090 (in T2 this becomes adding 10 or 100 to 100  900)
7.1 Use estimation strategies to make reasonable estimates in problem solving. CA
 Use estimations strategies in computation and problem solving with numbers up to 100



Week 12
Math Experiences
Curriculum and Pacing

Additional ResourcesMath MountainsStrategiesNumber BondsBeat the Calculator/Ganarale a la CalculadoraBeat the CalculatorStory Problems SamplesCover Up!/ CubrirMaking TowersCollect 50¢Place ValueDecomposing 2 Digit Numbers 