Subtraction within 20 HUGE differentiated first grade math unit that makes subtracting fun. This JAM-PACKED unit is filled with 162 pages of everything you need to teach subtraction within 20. This pack covers 5 main standards/concepts: subtraction within 20, number lines (counting back), word problems, backwards doubles, and mixed review (addition/subtraction review).

Get this in the First Grade Math Units 1-9 BUNDLE to save a ton!

**Please click the green PREVIEW button above**
It will show you the table of contents to give you an idea of what is included. It is structured like my previous math units so if you click the links below to the other math units, their previews can show you more of what you're getting. I will post a picture collage preview like the others eventually but my main goal is getting the math units out to you as fast as possible since they have been so highly requested so there will not be a collage preview for quite awhile so I can focus my attention on bringing you more units faster :)


This is everything you need to print and go to teach these concepts to a variety of learners - it will save you so much time! Plus, ALL of your students will be guided into learning and having fun at their own level since everything is already differentiated for you! This pack will make your math planning a breeze!


For my other first grade math units:

First Grade Math Unit 1
First Grade Math Unit 2
First Grade Math Unit 3
First Grade Math Unit 4
First Grade Math Unit 5
First Grade Math Unit 7
First Grade Math Unit 8
First Grade Math Unit 9

You can currently get all of these at a deep discount in the Units 1-9 bundle!!
First Grade Math Units 1-9 BUNDLED

First Grade Math Unit 10
First Grade Math Unit 11
First Grade Math Unit 12
First Grade Math Unit 13
First Grade Math Unit 14
First Grade Math Unit 15
First Grade Math Unit 16
First Grade Math Unit 17
First Grade Math Unit 18

which you can also get for a deep discount in the
First Grade Math Units 10-18 BUNDLE