# ALEX Classroom Resource

## Subtracting Within 1000: Three-Digit Numbers and Regrouping

Classroom Resource Information

Title:

Subtracting Within 1000: Three-Digit Numbers and Regrouping

URL:

https://aptv.pbslearningmedia.org/resource/qotam19nqcq/regrouping-when-subtracting-three-digit-numbers-khan-qotam19nqcq/

Content Source:

PBS
Type: Learning Activity

Overview:

When there aren't enough tens (or hundreds, etc.) to subtract with, we can borrow (also called regrouping). This module provides videos and practice problems that demonstrate the standard algorithm for subtraction

Content Standard(s):
 Mathematics MA2015 (2016) Grade: 4 9 ) Fluently add and subtract multi-digit whole numbers using the standard algorithm. [4-NBT4] NAEP Framework NAEP Statement:: 8NPO3a: Perform computations with rational numbers. Alabama Alternate Achievement Standards AAS Standard: M.AAS.4.9- Add and subtract one- and two-digit numbers with regrouping.
Tags: multidigit, subtraction, subtraction algorithm