400
430 If the number on the end is 5 or more then you round up (in this case 6). If it was less than 5 you would round down to 420.
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.
455
That means multiply it by 2. If your tens digit is 3, your ones digit is 6.
28
6
The digit in the ones position is a 6, so the number is rounded up, giving 1000 as the answer.
7.06
No, a multiple of 6 cannot have a ones digit equal to 3. The ones digit of a multiple of 6 will always be even, either 0, 2, 4, 6, or 8, because 6 is divisible by 2.
6 ones, or 6.
6 ones, or 6.