To the nearest ten thousand, it is zero.
Zero
4 rounds to zero.
850
380
When you round a single number to the nearest ten, you ALWAYS go to 0.
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.
To round 38519 to the nearest ten thousand, we look at the digit in the ten thousand's place, which is 3. Since the digit to the right of the ten thousand's place is 8, we round up the ten thousand's place to 4. Therefore, 38519 rounded to the nearest ten thousand is 40000.
As it ends in 4, we round down so the answer is 980.
7240
4 makes it round down, so it is 600 to the nearest ten. 04 makes it round down also, so it is also 600 to the nearest hundred.
16330