7.7 billion rounded to the nearest 1 billion would be 8 billion.
5.7 billion rounded to the nearest 1 billion would be 6 billion.
6.9 billion rounded to the nearest 1 billion would be 7 billion.
35.65 rounded to the nearest 1 is 36.
1.0
1
1
1
1.45 rounded to the nearest whole number is 1.0.
1 billion.
1/8 rounded to the nearest 1/2 is 0.0
The rule when rounding off numbers is "If the first figure to be discarded is 5 or more then the previous figure is increased by 1". As the nearest 100 is required then regard 77 as 077. The first number to be discarded is 7 and as this is greater than 5 then the previous number (which is 0) is increased by 1. So 77 rounded to the nearest 100 becomes 100.
It is 29.1 rounded to the nearest 1/10 or 29.12 rounded to the nearest 1/100