* Fluently add within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. Examples for 57 + 35: Traditional Method: Add the ones (7+5=12), put the 2 in the ones, carry the ten to the tens place, add the tens (5+3+1=9), the answer is 92 Add the tens, then the ones: 50 + 30 is 80, 7 + 5 is 12, 80 + 12= 80 + 10 + 2= 92 Take From One Addend: 57 + 35, if I take 3 from 35, I can make 57 into 60, 60 + the 32 left is 92
* Use addition within 100 to solve one- and two-step word problems.
* Explain why addition strategies work, using place value and the properties of operations.
* Add within 100, using number line, diagrams, concrete models or drawings, and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
* Add up to four two-digit numbers using strategies based on place value and properties of operations.
* Students will recognize or recall specific vocabulary, such as: Add, addition, diagram, difference, digit, length, number, number line, operation, place value, property, relationship, represent, strategy, subtract, subtraction, sum, whole number, word problem, rectangular array, equation