Doubles?
Alignments to Content Standards:
1.OA.B.3
Task
Abel said,
How 6 + 6 should be 11:Â
Because 5 + 5 is 10 and 6 is one more than 5 and 11 is one more than 10. Thatâs why 6 + 6 should be 11.
Â
Rula said,
How 6 + 6 should be 12:
Because 5 + 5 is 10 and the sixes donât have room to get in and itâs two sixes right, so
||
that is why 6 + 6 should be 12.
Â
Who is right?
IM Commentary
This illustrates MP3.
Doubles?
Abel said,
How 6 + 6 should be 11:Â
Because 5 + 5 is 10 and 6 is one more than 5 and 11 is one more than 10. Thatâs why 6 + 6 should be 11.
Â
Rula said,
How 6 + 6 should be 12:
Because 5 + 5 is 10 and the sixes donât have room to get in and itâs two sixes right, so
||
that is why 6 + 6 should be 12.
Â
Who is right?