abacus
An abacus. The bottom line is ones, the second is tens, and etc. Basically, it was an ancient calculator.
An abacus (or soroban in Japan)
abacus
The TI-30X calculator does not have a dedicated factorial button. However, you can calculate factorials by using the combination or permutation functions available on the calculator. Alternatively, you can compute factorials manually or by using a sequence of multiplications for small numbers. For larger numbers, it's often easier to use a different calculator or software that supports factorial calculations directly.
yes
Calculating is manipulating numbers. It may be done manually on pen and pare, on the computer, or on a traditional calculator.
The counters are for destinations depending on the last bound and direction. In 2015, they were 14, For 2017m no idea. One have to be in the station to count it manually. No other way to know the numbers (e,g from web, statistical bureu)
When you type in 10.5 x 8 in the calculator and it displays 84, it is likely due to the calculator's settings. Some calculators are set to perform calculations using integer arithmetic, which means they truncate decimal numbers instead of rounding them. In this case, 10.5 is being truncated to 10, resulting in the incorrect answer of 10 x 8 = 80. To avoid this issue, you can adjust the calculator settings to display decimal answers or manually input the correct decimal numbers for more precise calculations.
Use a calculator if you can't do the math manually.
Use the link provided to University of Arizona math page where the algorithm is explained.
You can't 'get rid' of them - if the problem creates them in the answer. You can, however, manually round the answer up or down to a more manageable figure.
Bankrate offers a free online loan calculator, as does the Calculator website. Alternatively, one can do the calculations manually; with an initial value of A and an interest rate of B per year, the value after C years is A*(1+B)^C, where the "^" represents exponentiation.