To the nearest decimal it must be 6868000000.018 since this is exactly equal to the specified number and any other representation would be different - no matter how small the difference.
.56
0.300
3.45 to the nearest decimal place = 3.5
5.43 to the nearest decimal place = 5.4
There is no such thing as the "nearest decimal place".
You can write a fraction that is a mixed number as a decimal by diving the numerator by the denominator then rounding it to the nearest thousand.
.56
7.00
0.300
7/9 writte as a decimal is .777 repeating. You can round this decimal to the nearest hundredth as 0.78
Write 5/6 as a decimal number rounded off to the nearest hundredth
In the absence of any decimal point, it's already there.
write the number 15.46 correct to one decimal place
179
There is no such thing as the "nearest decimal place".
5.43 to the nearest decimal place = 5.4
3.45 to the nearest decimal place = 3.5