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Lesson: Mental Subtraction of Numbers up to 1,000 Mathematics • 2nd Grade

In this lesson, we will learn how to subtract from three-digit numbers using mental strategies rather than the column method.

Lesson Plan

Students will be able to

Q1:

Sophia is reading a book that is 912 pages. She has already read 196 pages. How many pages does she have left to read?

Q2:

Noah works at a pet store. He put 315 bags of cat food on the shelf. Customers bought 219 bags. How many bags are left?

Q3:

David knows that .

Find: .