Chapter 2.6

Addition with regrouping up to 100


What You'll Learn

Recognize when regrouping is necessary in two-digit addition problems
Apply the regrouping method when the ones column sum exceeds 9
Calculate sums up to 100 by carrying over to the tens place
Solve addition problems using place value understanding and regrouping

What You'll Practice

1

Adding two-digit numbers that require regrouping in the ones place

2

Solving missing number problems involving regrouping

3

Computing sums where ones digits add up to 10 or more

Why This Matters

Addition with regrouping is a fundamental math skill you'll use every day, from handling money to measuring ingredients. Mastering regrouping builds your number sense and prepares you for multi-digit addition, subtraction with borrowing, and all future math operations.

This Unit Includes

Practice exercises

Skills

Regrouping
Place Value
Two-Digit Addition
Carrying
Mental Math
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