Posted by
Alexandra on
.
If you forget the product of 9 and 9, what can you do to figure it out?

Math/3rd grade 
Ms. Sue,
Use a calculator.
Or better yet  remember that the digits of the product or 9 times any number will always add up to 9.
18, 27, 36, 45, 54, 63, 72, 81, 90
Another way is to multiply 9 * 10 = 90 and subtract 9 from 90.

Math/3rd grade 
uw,
pillow