Lesson: Subtracting Ones from Three-Digit Numbers Math in Focus • Singapore Math • Grade 2 • Volume A • Common CoreMathematics
In this lesson, we will learn how to use models to subtract a one-digit number from a three-digit number and investigate which digits in the number change.
Sample Question Videos
Find the difference by first subtracting ones.
Look at how Michael broke apart a number to help him subtract.
Subtract the ones: .
Add the leftover ones to 230 to find .
Look at how Mia broke apart a number to help her subtract.
Subtract the ones.
Add the leftover ones to 460 to find .