CDIX = 409 and XCV = 95, so 409 + 95 = 504 (DIV)
standard numeral of 300 000+300+1+50+3 000
9 = 5 + 4 = 1*(5^1) + 4*(5^0)So Decimal(9) = Base5(14).
easy, 1011. in binary of course. convert 1011 binary to decimal you get 11.
A negative decimal plus a negative decimal equals a more negative decimal
376
The number 5.9 is already in decimal form. We know that 5.9 is 5 plus 9/10. The 9/10 is 0.9, so 5 + 9/10 is 5.9 as already written in decimal form.
84
56
Find 20% of 800. Divide the percentage by 100 to convert it to a decimal. You get 0.2. Then multiply the decimal by the amount. 0.2 x 800. You get 160. Then add this to the original amount. 800 + 160 = 960. Or to simplify this...you can just multiply 800 by 1.2 (1 plus the percentage in decimal form).
0.85, here's how:1/2 = 0.501/4 = 0.251/10 = 0.10Add them together to get 0.85 You could also convert the fractions to common denominators first, to get 10/20 + 5/20 + 2/20 = 17/20, then convert that to get the same decimal (0.85).
408
If you want to add numbers in different bases, in this case decimal and binary, or do any other calculation that involves different bases for that matter, you have to convert all numbers to a single system first - for example, all to decimal. Then you can do the operation. It is really up to you in what base you represent the final answer. In this example, you can convert back to binary, for example.