Standard Alignments:

TEKS Math: 2.4.B

(B) Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations

AU Math: ACMNA030

(Y2) Solve simple addition and subtraction problems using a range of efficient mental and written strategies (ACMNA030)

CCSS Math: 2.NBT.5

2.NBT.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Related Lessons

Identify the Place and Value of Digits in a Three-Digit Number
Add Two-Digit Numbers (With Composing)
Write Numbers Using Expanded Form
Add Three-Digit Numbers (With Regrouping)
Add Two-Digit Numbers (Without Composing)
Skip-Count By 5s, 10s, and 100s
Compare Three-Digit Numbers Using Symbols
Add Up To Four Two-Digit Numbers
Count Within 1000
Subtract Three Digit Numbers with Decomposing
Subtract Two-Digit Numbers (Without Decomposing)

Related Concepts

Solve Subtraction Equations
Use Fact Families
Memorize Subtraction Facts
Write Subtraction Equations
Create Story Problems (Addition & Subtraction)
Subtract Numbers by Counting Down
Solve Subtraction Equations
Write equations that equal odd or even numbers (subtraction)
Subtract Two-Digit Numbers (Without Decomposing)
Subtract Three Digit Numbers with Decomposing
Add & Subtract Time Intervals
Solve Problems Involving Time Intervals
Subtract Multi-Digit Numbers With Decomposing
Solve Two-Step Word Problems with an Unknown (4 Operations)
Solve Subtraction Word Problems (With Decomposing)
Use Rounding to Estimate Answers
Flashcards Subtract Three-Digits without Composing
Subtract Multi-Digit Numbers (with Decomposing)
Subtract Fractions with Like Denominators
Memorize Subtraction Facts
Subtract Numbers (1-5)
Solve Subtraction Word Problems