Doubles, Doubles +1 and Doubles + 2

Our Justin Bieber version of "Baby" (aka our Doubles song) has become a staple in our room! It has helped us remember and learn our doubles which is so important to help us solve doubles +1 and doubles + 2 problems.

If we know our doubles we can do this:

                                        3+4= 7 by knowing that 3+3=6 and then add 1.
                                           
                                                                                OR

                                                       4+6=10 by:

doing doubles + 2:        so 4+4=8     and 8+2 =10

                            Or

doing the trick:             so we find the number in between 4 and 6 and double it and that's the answer.
                                        5+5=10

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