First 9 X 10 is easy to calculate. Any number times 10 is that number with a 0 added.
9 X 10 = 90
Then you just add the 9 to it to have the same answer as if you multiplied 9 X 11.
90 + 9 = 99
or
9 X 11 = 99
Chat with our AI personalities
The numbers are -12, -11, -10 and -9.
10 and 11
16 10/11 - 9 = 7 10/11
9 and 10 are but 11 is prime
10 out of 11