2.NBT.5:
Number And Operations In Base Ten
Use Place Value Understanding And Properties Of Operations To Add And Subtract.
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
2.OA.4:
Operations And Algebraic Thinking
Work With Equal Groups Of Objects To Gain Foundations For Multiplication.
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
2.MD.4:
Measurement And Data
Measure And Estimate Lengths In Standard Units.
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
