29 pages of resources for Place Value 1.NBT CC Math.The unit includes student sheets, flashcards, and games.Standards covered:Decade numbers, adding decade numbers, 10 more, 10 less, 10 and some more (teen numbers), using a 120 chart to add, using basic addition facts to add decade numbers, comparing numbers, ten frame memory match, top-it decade numbers, using models to add, mental math...etc.1.NBT.B.11.NBT.B.21.NBT.B.2a1.NBT.B.2b1.NBT.B.2c1.NBT.B.31.NBT.C.41.NBT.C.5