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Develop quick recall of addition facts and related subtraction facts and fluency with multi-digit addition and subtraction.

Number: MA.2.A.2

Title: BIG IDEA 2

Type: Big Idea

Subject: X-Mathematics (former standards - 2008) - Archived

Grade: 2

Body of Knowledge: Algebra

This cluster includes the following benchmarks

Code	Description
MA.2.A.2.1:	Recall basic addition and related subtraction facts.
MA.2.A.2.2:	Add and subtract multi-digit whole numbers through three digits with fluency by using a variety of strategies, including invented and standard algorithms and explanations of those procedures.
MA.2.A.2.3:	Estimate solutions to multi-digit addition and subtraction problems through three digits.
MA.2.A.2.4:	Solve addition and subtraction problems that involve measurement and geometry.

This cluster includes the following access points.

Access Point Number	Access Point Title
MA.2.A.2.In.a:	Identify the meaning of the +, -, and = signs in addition and subtraction problems.
MA.2.A.2.In.b:	Use counting and one-to-one correspondence as strategies to solve problems involving addition facts with sums to 10 and related subtraction facts using numerals with sets of pictures.
MA.2.A.2.In.c:	Solve real-world problems involving addition facts with sums to 10 and related subtraction facts, including money, measurement, geometry, and other problem situations.

Access Point Number	Access Point Title
MA.2.A.2.Su.a:	Identify the meaning of addition as adding to and subtraction as taking away from, using sets of objects.
MA.2.A.2.Su.b:	Use counting and one-to-one correspondence as strategies to solve number stories involving addition facts with sums to 5 and related subtraction facts using sets of objects.
MA.2.A.2.Su.c:	Solve real-world problems involving addition facts with sums to 5 and related subtraction facts using sets of objects.

Access Point Number	Access Point Title
MA.2.A.2.Pa.a:	Compare quantities to 3 using language, such as more, less, or the same.
MA.2.A.2.Pa.b:	Solve simple real-world problems involving joining or separating small quantities of objects.

Vetted resources educators can use to teach the concepts and skills in this topic.

Name	Description
The Game of Tens and Ones: A Lesson for Second Graders:	"This game gives children practice with adding and subtracting ones and tens. Using a special die, two 0 99 charts, and two markers, children play in pairs. During the course of a game, they calculate between 20 and 30 addition and subtraction problems." (from Math Solutions Professional Development)

Big Idea 2 : BIG IDEA 2 (Archived)