add. write the doubles fact used to solve each one.

Question

0+1=1
6+7 =13
4+3=7
please explain how to use doubles plus 1 and doubles minus 1

Answer 1

how much did maria bean plant grow between day 2 and day 3

Answer 2

double the biggest number then take away one eg 4+4=8-1=7 that is the example of 4+3=7