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
5-1-1 Identify and Extend Simple Patterns (AB, ABB, etc)

5-1-1 Identify and Extend Simple Patterns (AB, ABB, etc)

Key Concepts

1. Understanding Simple Patterns

Simple patterns are sequences of elements that follow a specific rule or repetition. These patterns can be identified by recognizing the rule that governs the sequence.

2. Types of Simple Patterns

Common types of simple patterns include AB, ABB, ABC, and AAB. Each type has a unique rule that determines how the elements repeat.

3. Extending Patterns

Extending a pattern involves continuing the sequence by applying the same rule that was used to create the original pattern.

Detailed Explanation

Understanding Simple Patterns

A pattern is a sequence of elements that repeats according to a specific rule. For example, in the pattern AB, the elements alternate between A and B.

Types of Simple Patterns

Different patterns have different rules:

Extending Patterns

To extend a pattern, identify the rule and continue the sequence by applying that rule. For example, if the pattern is AB, the next elements would be A, B, A, B, and so on.

Examples

Example 1: AB Pattern

Pattern: A, B, A, B

Extend: A, B, A, B, A, B

Example 2: ABB Pattern

Pattern: A, B, B, A, B, B

Extend: A, B, B, A, B, B, A, B, B

Example 3: ABC Pattern

Pattern: A, B, C, A, B, C

Extend: A, B, C, A, B, C, A, B, C

Example 4: AAB Pattern

Pattern: A, A, B, A, A, B

Extend: A, A, B, A, A, B, A, A, B

Analogies

Analogy 1: Like a Dance Step

Think of a simple pattern as a dance step. Each step follows a specific sequence, and when you repeat the sequence, you continue the dance. For example, a dance with steps AB would alternate between two moves.

Analogy 2: Like a Musical Beat

Imagine a simple pattern as a musical beat. Each beat follows a specific rhythm, and when you continue the rhythm, you extend the music. For example, a beat with pattern ABB would have a strong beat followed by two lighter beats.