Well, you couldn’t get more simple than this set of plain Jane subtraction flash cards. Included are all the subtraction facts for 3’s for numbers 0-20. There are three pages in black and white with eight cards per page.
CCSS 1.OA.C.6
Please go to this page to see all the subtraction flash cards for 0-20 in this set.
![subtraction flash cards 0-20 3's b&w](https://www.awellspringofworksheets.com/wp-content/uploads/2016/03/subtraction-flash-cards-3s-0-20-bw_premium-231x300.jpg)
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