1.NBT.6
Standard
Standard
Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), 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.
Student Language:
- "I can use different strategies to subtract multiples of 10 (10-90) from numbers under 100, write the matching number sentence and explain my strategy."
Resources
Resources
Videos
Videos
- Khan Academy
- Scroll to 1.NBT.6, 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.6
- Common Core Sheets