Lesson: Subtracting Ones From Teen Numbers Mathematics • Second Year of Primary School

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In this lesson, we will learn how to subtract a one-digit number from a teen number when we do not cross a ten by subtracting ones.

Students will be able to

use models to help subtract a single-digit number from a teen number,
partition the two-digit minuend to help subtract a single-digit number from a teen number,
count back to help subtract a single-digit number from a teen number,
solve word-based problems involving subtraction of single-digit numbers from teen numbers.