555
199
6700
2722
500
0
5600
The number would be 2666. 6 is repeated 3 times. Rounded to the nearest hundred is 2700 and rounded to the nearest thousand is 3000.
3.14 rounded to the nearest one hundred millionth is 3.140000000. Since there are no digits beyond the hundred millionth place that would affect the rounding, the value remains the same.
199
648 rounded to the nearest hundred is 600.
The mystery number is 155. When rounded to the nearest hundred, it rounds to 200. The sum of its digits is 1+5+5=11 which is greater than 10, so we must adjust the digit in the hundreds place. When rounded to the nearest ten, 155 rounds to 160, which has digits summing up to 1+6+0=7.
27222722
278879 rounded to the nearest hundred - is 278900. The last two digits (79) are greater than 50 so you round up.
1400
6700
2722
863.00