One number above 100 and one number less than 100

[AnjaliB]

Is there a trick for multiplying 104 * 93 ?

Thanks for any help in advance!

[jahu]

the difference from 100 for both is 4 and 7. Multiply that and get 28, but this time you subtract it from 100 for your tens and ones digit which is 72. Also, you see that one is +4 from 100 and another is -7 from 100. Add 4 and -7 and add to 99 which is 96.

9672

[papergangsta]

What if it was like 112 x 91? Where it would be 12 x 9, which is larger than 100? I know my explanation is stupid but hopefully you can figure it out. Thanks:)

[Gurgle]

10192
+12 -9
112x91

12 times 9 = 108
Since it's over 100 you subtract 108 from the hundreds digit 3 ; the term is 300
300-108
10/192

Therefore 10192.