1.NBT.4
Standard
Standard
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
Student Language:
- "I can use math strategies to help me solve and explain addition problems within 100."
- "I can use objects and pictures to help me solve and explain addition problems within 100."
- "I can understand that adding two-digit numbers means I add the ones and then the tens."
- "I can understand that when I add two-digit numbers, sometimes I have to make a group of ten from the ones. (regroup)"
Resources
Resources
Videos
Videos
- Khan Academy
- Scroll to 1.NBT.4, click on skill, find videos on left side of each skill
Extra Practice
Extra Practice
- North Carolina Tasks
- Illustrative Math Tasks
- Howard County Tasks
- Click on 1st grade at bottom, then 1.NBT.4
- Common Core Sheets