All Common Core: 1st Grade Math Resources
Example Questions
Example Question #31 : Place Value And Properties Of Operations To Add And Subtract
When we add to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add to the number in the tens place to find our answer.
Example Question #2171 : Operations
When we add to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add to the number in the tens place to find our answer.
Example Question #33 : Place Value And Properties Of Operations To Add And Subtract
When we add to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add to the number in the tens place to find our answer.
Example Question #34 : Place Value And Properties Of Operations To Add And Subtract
When we add to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add to the number in the tens place to find our answer.
Example Question #35 : Place Value And Properties Of Operations To Add And Subtract
When we add to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add to the number in the tens place to find our answer.
Example Question #291 : Number & Operations In Base Ten
When we add to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add to the number in the tens place to find our answer.
Example Question #965 : Numbers And Operations
When we subtract from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract from the number in the tens place to find our answer.
Example Question #966 : Numbers And Operations
When we subtract from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract from the number in the tens place to find our answer.
Example Question #967 : Numbers And Operations
When we subtract from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract from the number in the tens place to find our answer.
Example Question #968 : Numbers And Operations
When we subtract from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract from the number in the tens place to find our answer.