65, 66 67 68 and 69 can all be numbers to be rounded to 70.
71
72
73
74
It then is 70 when rounded to the nearest ten
600
70 When the number you are trying to round, ends in 5 or more, round up. If it ends is a number below 5, round down.
70
70
70
The answer is 70. To round any number look at the number before the desired DP, if it's more than 5 round the number up. A calculator is the best option. It is normally rounded up to 70, but can be rounded down to 69.
It then is 70 when rounded to the nearest ten
70
600
70
65 to 69
70 When the number you are trying to round, ends in 5 or more, round up. If it ends is a number below 5, round down.
35 will be rounded up to 40 and 67 to 70 40 + 70 = 110
70
70
60