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.


Lesson Planning and Activity Resources

Math Playground.JPG
1.NBT--Interactive games for Numbers & Operations in Base Ten

CCGPS.JPG
Grade 1 Unit: Understanding Place Value
(from Georgia Department of Education)
This unit addresses KCAS 1.NBT.2-6 and 1.MD.4.
common core sheets.JPG
http://www.commoncoresheets.com/SortedByGrade.php?Sorted=1nbt6
Interactive Material - Subtract multiples of 10 from other multiples of 10.
Worksheets subtracting multiples of 10.