139 rounded to the nearest ten is 140,
143 rounded to the nearest ten is 140.
140
140
140
140
140
140
140
140
This depends what you are rounding it by. To the nearest whole number it would be: 143. To the nearest ten it would be 140.
When rounding 143 to the nearest ten, you look at the digit in the tens place, which is 4. Since 4 is less than 5, you round down. Therefore, 143 rounded to the nearest ten is 140.