1.NBT.C.5
Mentally find 10 more or 10 less than a two-digit number
Read the official standard at corestandards.org
Work toward it with Peabody
- Ten more, ten lessSkill page with practice
- Ten more, ten less: 1st grade math lesson plan, question set and printable sheetLesson plan and question set
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© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved. Standards are listed here by code with our own summaries; the official text is at corestandards.org.