Mindy McNicholas United States of America
Subracting 9 from 11-19 quick trick!
Subtracting 9 can be a long task for some... not anymore! Watch this short video and watch your child answer improve in accuracy and time!
11 Times trick Level 3
Learn an easy way to multiply any number by 11... another Fast Math trick by Mrs. Mack! (Be sure to watch 11 times trick Level 4 to see how this was discovered!)