====== MA 01.NBT.C.6   ======


====Standard:====
MA 01.NBT.C.6 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.    
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====Standard Unpacked:====
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.   

70 - 10 = 

30 - 10 = 

50 - 20 =

70 - 30 =  
   

==== Lesson Plans: ====



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==== Resources: ====
Good Projects here: Illustrative Mathematics https://www.illustrativemathematics.org/1


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