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Math for Grade 2
1 Number Sense and Numeration
1-1 Counting
1-1 1 Count forward from any given number up to 100
1-1 2 Count backward from any given number within 100
1-2 Place Value
1-2 1 Understand the concept of tens and ones
1-2 2 Identify the place value of digits in two-digit numbers
1-3 Comparing Numbers
1-3 1 Compare two-digit numbers using symbols (<, >, =)
1-3 2 Order numbers from least to greatest and greatest to least
1-4 Rounding
1-4 1 Round numbers to the nearest ten
2 Addition and Subtraction
2-1 Basic Addition
2-1 1 Add two one-digit numbers
2-1 2 Add a one-digit number to a two-digit number
2-2 Basic Subtraction
2-2 1 Subtract two one-digit numbers
2-2 2 Subtract a one-digit number from a two-digit number
2-3 Addition and Subtraction Facts
2-3 1 Memorize addition facts for sums up to 20
2-3 2 Memorize subtraction facts for differences up to 20
2-4 Word Problems
2-4 1 Solve addition word problems with two-digit numbers
2-4 2 Solve subtraction word problems with two-digit numbers
3 Measurement and Data
3-1 Length
3-1 1 Compare the lengths of objects using non-standard units
3-1 2 Measure the lengths of objects using standard units (centimeters and meters)
3-2 Time
3-2 1 Tell time to the nearest hour and half-hour
3-2 2 Understand the concept of A M and P M
3-3 Data Collection
3-3 1 Collect and organize data in a simple bar graph
3-3 2 Interpret data from a simple bar graph
4 Geometry
4-1 Shapes
4-1 1 Identify and name basic 2D shapes (circle, square, triangle, rectangle)
4-1 2 Identify and name basic 3D shapes (cube, sphere, cone, cylinder)
4-2 Spatial Relationships
4-2 1 Understand and use positional words (above, below, beside, between, etc )
4-2 2 Understand and use directional words (left, right, forward, backward)
5 Patterns and Algebra
5-1 Patterns
5-1 1 Identify and extend simple patterns (AB, ABB, etc )
5-1 2 Create and describe patterns using shapes, colors, and numbers
5-2 Algebraic Thinking
5-2 1 Understand the concept of equality (e g , 3 + 2 = 5)
5-2 2 Use variables to represent unknown numbers in simple equations
Identify and Name Basic 2D Shapes

Identify and Name Basic 2D Shapes

Key Concepts

1. Circle

A circle is a round shape with no corners or edges. All points on the circle are the same distance from the center.

2. Square

A square is a shape with four equal sides and four right angles (90 degrees). All sides are the same length.

3. Triangle

A triangle is a shape with three sides and three angles. The sum of the angles in a triangle is always 180 degrees.

4. Rectangle

A rectangle is a shape with four sides and four right angles. It has two pairs of equal, opposite sides.

Detailed Explanation

Circle

A circle is a perfectly round shape. Imagine a ball or a coin. The distance from the center of the circle to any point on its edge is always the same. This distance is called the radius.

Square

A square has four equal sides and four right angles. Think of a piece of paper cut into a perfect square. Each side is the same length, and each angle is 90 degrees.

Triangle

A triangle has three sides and three angles. There are different types of triangles, such as equilateral (all sides equal), isosceles (two sides equal), and scalene (no sides equal). The sum of the angles in any triangle is always 180 degrees.

Rectangle

A rectangle has four sides and four right angles. The opposite sides are equal in length. Think of a door or a window. They are usually rectangular in shape.

Examples

Example 1: Identifying a Circle

Look at a round clock on the wall. The face of the clock is a circle.

Example 2: Identifying a Square

Look at a chessboard. Each small square on the board is a square shape.

Example 3: Identifying a Triangle

Look at a slice of pizza. The slice is usually in the shape of a triangle.

Example 4: Identifying a Rectangle

Look at a book. The cover of the book is usually in the shape of a rectangle.

Analogies

Analogy 1: Circle as a Ball

Think of a circle as a ball. It rolls smoothly because it has no corners or edges.

Analogy 2: Square as a Box

Imagine a square as a box. It has four equal sides and can stand upright because of its right angles.

Analogy 3: Triangle as a Slice of Pizza

Think of a triangle as a slice of pizza. It has three sides and three angles, just like the slice you eat.

Analogy 4: Rectangle as a Door

Imagine a rectangle as a door. It has four sides and four right angles, making it easy to open and close.

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