0.045 to 0.054 -- ten of them.
There are infinitely many of them. 0.3011, 0.30111, 0.3011111111, 0.30151 are 4 examples.
It is not always the same. In many countries, the smallest unit of money is 0.01 (hundredth), so money is almost always rounded to two decimals. But this may vary from country to country. Some may use more or less decimals - or not use decimals at all.
All of them from 0.0450 to 0.0549 . That's 99 of them, but I think 98 is a better answer, because 0.0500 wouldn't need to be rounded at all.
800
99 of them.
0.05
0.045 to 0.054 -- ten of them.
There are infinitely many of them. 0.3011, 0.30111, 0.3011111111, 0.30151 are 4 examples.
It is not always the same. In many countries, the smallest unit of money is 0.01 (hundredth), so money is almost always rounded to two decimals. But this may vary from country to country. Some may use more or less decimals - or not use decimals at all.
All of them from 0.0450 to 0.0549 . That's 99 of them, but I think 98 is a better answer, because 0.0500 wouldn't need to be rounded at all.
6 decimal place
800
You go backwards in decimals three times. Answer = 300 milligrams.
When rounding off a number to a certain decimal place, you look at the digit immediately to the right of that decimal place. In this case, the digit after the hundredths place (the 7) is greater than or equal to 5, so you round up the digit in the hundredths place (the 6) by adding 1. Therefore, 1.66666667 rounded off to two decimal places is 1.67.
There are infinitely many numbers. Three examples are: 3.0000000000000012300045973 3.00000000000000123000459746009 4.999999999999999999999999
1. When adding, the decimals MUST line up: 012.3 +32.1 2. When multiplying, you dont have to put the decimals side by side: 12.3 x323.55 Then you count how many numbers are after the decimals, which, in this case, is three. Hope it helped!