This set of 30 task cards is designed to challenge those students who have a good understanding of place value and can mentally add or subtract 100 when given a number. These task cards require students to think deeply about what number they must add or subtract 100 to. I used this with my students this year and it was so challenging and fun for them. Enjoy! :)

If you like these please consider my 10 more 10 less task cards:
https://www.teacherspayteachers.com/Product/10-More-10-Less-Task-Cards-2390141