Teach students to use estimation to check whether their addition and subtraction answers are reasonable with these estimation problem slides. Students round numbers before solving, then apply the same thinking to real-world problems like affordability and word problems.
What's included:
Introductory slides explaining what estimation is and why it's useful
Estimate then check slides, comparing an exact calculation with an estimated one
8 practice slides applying estimation to real-world problems, including affordability and word problems