Common Core: 2nd Grade Math : Common Core Math: Grade 2
Study concepts, example questions & explanations for Common Core: 2nd Grade Math
All Common Core: 2nd Grade Math Resources
Example Questions
Example Question #425 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2
To add we count up. Start at 
Example Question #426 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2
To add we count up. Start at 
Example Question #427 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2
To add we count up. Start at 
Example Question #428 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2
To add we count up. Start at 
Example Question #429 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2
To add we count up. Start at 
Example Question #430 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2
To add we count up. Start at 
Example Question #541 : How To Subtract
To subtract we can count backwards. Start at 
Example Question #2082 : Common Core Math: Grade 2
To add we count up. Start at 
Example Question #431 : Operations & Algebraic Thinking
Is there an even or an odd number of dots below?
Odd
Both
Even
Neither
Odd
When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items.
In this case, we have one dot not in a pair, so we have an odd number of dots.
Example Question #432 : Operations & Algebraic Thinking
Is there an even or an odd number of dots below?
Even
Odd
Both
Neither
Even
When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items.
In this case, our dots are in a pair of two, so we have an even number of dots.
All Common Core: 2nd Grade Math Resources
