UNIT 1 CHAPTER 1

Students must explain why addition strategies work to meet 2.NBT.9. Day 3. 5-3 Add Two-Digit Numbers With and Without Regrouping. Use the standard algorithm to add 2-digit numbers with and without regrouping. 2.OA.1. 2.NBT.6. 2.NBT.7. 2.NBT.9 Two digit number Investigating the Concept p.179A . Regroup 10 Ones for 1 Ten. Leveled Practice: R5-3 ... ................
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