Content Standard(s):
Mathematics 2. Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 by using concrete objects, drawings, or equations with a symbol for the unknown number to represent the problem.
Unpacked Content
Evidence Of Student Attainment:
Students:
Compute the sum of three whole numbers using a variety of representations such as concrete objects, drawings, or equations.
Explain and justify the answer using the representations. Teacher Vocabulary:
Knowledge:
Students know:
how to solve for addition by using strategies and understanding the relationship between addition and subtraction. Skills:
Students are able to:
efficiently apply strategies for solving multiple addend problems.
Use symbols to represent unknown quantities in equations.
Accurately compute sums. Understanding:
Students understand that:
more than two quantities can be combined in a problem. Diverse Learning Needs:
Essential Skills:
Learning Objectives: M.1.2.1: Solve addition word problems with sums less than or equal to 10, e.g., by using objects or drawings to represent the problem.
M.1.2.2: Understand key words in addition word problems. M.1.2.3: Define addition as combining groups of objects, adding to, or putting together.
M.1.2.4: Represent addition with objects, fingers, mental images, drawings, sounds, acting out situations, verbal explanations, expressions, or equations.
M.1.2.5: Represent numbers with objects or drawings.
M.1.2.6: Use objects to combine groups.
Prior Knowledge Skills:
Understand key words in addition and subtraction word problems. Represent numbers with objects or drawings.
Separate sets with nine or fewer objects.
Combine objects to form sets up to nine.
Represent addition and subtraction with objects, pictures, fingers, or sounds within twenty.
Understand addition as putting together and subtraction as taking from.
Establish one-to-one correspondence between numbers and objects.
Rote count to 20.
Notice same/different and some/all.
Establish one-to-one correspondence between numbers and objects.
Point to matching or similar objects.
Alabama Alternate Achievement Standards
AAS Standard:
Mathematics 3. Apply properties of operations as strategies to add and subtract.
Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known (commutative property of addition). To add 2 + 6 + 4, the second and third numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12 (associative property of addition). When adding 0 to a number, the result is the same number (identity property of zero for addition).
Unpacked Content
Evidence Of Student Attainment:
Students:
Use informal language of properties to justify their sums and differences ("I already figured out that 8 + 3 = 11, and 3 + 8 is just the turn around of that so it must be 11, too."). Teacher Vocabulary:
Commutative property of addition
Associative property of addition
Identity property of zero for addition Knowledge:
Students know:
addition and subtraction strategies.
how to form an equation. li>how the commutative property works.Skills:
Students are able to:
Strategically apply properties of addition in order to find sums. Understanding:
Students understand that:
the order in which addends are joined doesn't change the sum.
numbers may be composed or decomposed in a variety of ways. Diverse Learning Needs:
Essential Skills:
Learning Objectives: M.1.3.1: Define addition and subtraction.
M.1.3.2: Recognize properties of operations.
M.1.3.3: Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1).
M.1.3.4: Apply signs +, -, = to actions of joining and separating sets.
M 1.3.5: Identify fact families to ten.
M.1.3.6: Recognize the value of zero.
Prior Knowledge Skills:
Decompose numbers up to 5 using objects or drawings.
Compose numbers up to 5 using objects or drawings.
Count backward from 5.
Count forward to 5.
Write numerals from 0 to 10.
Represent a given numeral 1 to 10 with objects or drawings.
Count forward from a given number 1 to 10.
Model joining sets of objects to total 10.
Identify plus, minus, and equal signs.
Match numerals to objects or drawings.
Identify numerals 1 to 10.
Count 0 to 10. Add and subtract numbers within 20 using objects, pictures and fingers.
Understand key words in addition and subtraction word problems. Represent numbers with objects or drawings.
Separate sets with nine or fewer objects.
Combine objects to form sets up to nine.
Count items in a set up to twenty.
Establish one-to-one correspondence between numbers and objects.
Using counting, find one less than a number 2 through 20.
Alabama Alternate Achievement Standards
AAS Standard:
