130
630
To round 1236 to the nearest 100, you need to look at the tens and ones digits. In this case, the tens digit is 3 and the ones digit is 6. Since the tens digit is less than 5, you round down. Therefore, 1236 rounded to the nearest 100 is 1200.
660
2400
660
'94' rounded to the nearest tens is '90'.
135
Yes.
1640
94
60
20
Look at the digit in ones place. If it is five or greater, round the digit in tens place to the next higher digit. If the digit in ones place is less than five, leave the digit in tens place as it is. 512162 rounded to the nearest tens is 512160.
89 rounds to 90
69
12.6 rounded to the nearest 10 is 10.