On this page, click on "first grade math vocabulary" and then a-l and m-z on the following page for some great common core vocabulary posters. (and the first grade math map also has some great resources listed at the end of each unit.)
Subtracting Integers Tri-Match Center and Recording Sheets Common Core Standard 7.NS.1 Included in this product: 18 Tri-Match Subtracting Integer Cards (Black and white and full color versions) Recording Worksheet Print the 18 sets of cards (54 cards total).
Tweet Tweet Math is not everyone’s cup of tea, but learning new math shortcuts can be a lot of fun. There are many of them to learn. This infographic happens to cover 6 math shortcuts: [via: Center of Math]