# math elementary

posted by
**eduardo**
.

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

0+1=1

6+7 =13

4+3=7

please explain how to use doubles plus 1 and doubles minus 1

posted by
**eduardo**
.

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

0+1=1

6+7 =13

4+3=7

please explain how to use doubles plus 1 and doubles minus 1