2.NBT.8 Mental Math- Mentally Add 10 or 100 and Subtract 10 or 100


Total Pages: 70
File Size: 2 MB


This standards-based place value unit focuses on the Common Core math standards 2.NBT.8. This asks students to mentally add 10 or 100 or mentally subtract 10 or 100 from a given number. There are daily lesson plans, whole group activities, partner practice activities, MATH group centers, exit slips, and assessments.

What’s included in the 3 daily lesson plans:

  • Whole group activity
  • Partner practice activity
  • MATH group: Math writing, Apply new skills, Teacher time, Hands-on math (Teacher time is differentiated learning opportunities for remediation, on-level, and enrichment.)
  • Exit slip

2.NBT.3 Focus:
–Day 1- Mentally Add or Subtract 100
–Day 2- Mentally Add or Subtract 10
–Day 3- Mentally Add/Subtract 10/100

Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

The 2.NBT.8 activities that are included in my short answer, centers, printables, and interactive notebooks are similar, but have all been changed to fit these lesson plans. The short answers have different prompts and are now part of MATH groups, the printables & interactive notebooks have been updated and are used during the ‘Apply new skills’ part of MATH groups.

Want more CCSS math units?
>>Extra Regrouping Unit


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