You have to move the decimal
That’s not the full question but if it was it would be greater bc 10 - 10=0 but 10-10+15 would equal 15 instead of 10
The HCF is the Highest Common Factor of a number in this case 54. This is the highest number times another number which = 54. The HCF for 54 is 18.
Less than means to subtract so 2678 less than 10000 will be
=10000-2678
=7322
The answer is that there is a proximity 10 miles of coast 9.904... it be exact
