9 x 6 = 5454 x 4 = 216
639
9/20
9
72
7/8 = 0.875 9/10 = 0.9
15
7 3/10 - 4 4/10 = 2 9/10, or two and nine tenths.
7 multiplyed by 4 equals 28
One tenth of seventy thousand is seven thousand.
9 tenth as a percentage = 90%
If you mean expression, then an expression is a math problem like 2 multiplyed by 2 or 9-2+3