Operations & Algebraic Thinking OA
2.OA.A.1 One- and two-step word problems within 100.
2.OA.B.2 Fluently add and subtract within 20; know one-digit sums from memory.
2.OA.C.3 Odd or even (up to 20); equal addends.
2.OA.C.4 Rectangular arrays (up to 5 rows and 5 columns) as repeated addition.
Number & Operations in Base Ten NBT
2.NBT.A.1 Three-digit numbers are hundreds, tens and ones.
2.NBT.A.2 Count within 1000; skip-count by 5s, 10s and 100s.
2.NBT.A.3 Read and write numbers to 1000: numerals, names, expanded form.
2.NBT.A.4 Compare three-digit numbers with >, = and <.
2.NBT.B.5 Fluently add and subtract within 100.
2.NBT.B.6 Add up to four two-digit numbers.
2.NBT.B.7 Add and subtract within 1000 using models and strategies.
2.NBT.B.8 Mentally add or subtract 10 or 100 (numbers 100–900).
2.NBT.B.9 Explain why addition and subtraction strategies work.