Answer:
The correct answer A.
Explanation:
Ok so we have ones, tenths and hundredths place values. The first one to the right is ones place value the second one to the right is tenths place value and the first one to the left is hundredths place value. So, we have to look at the tenths place value. If it is 4 or less than 4 (4,3,2,1) then you have to round down, for example: 14 -> 10, fourteen is rounded to ten because in the tenths place value it is 4, it would still be rounded to 10 if the number was 13,12 or 11. Ok, so now that we know that, you need to know, if the tenths place value is 5 or more (5,6,7,8,9) then you round up. For example: 15 -> 20 and it would also be rounded to 20 if it was 16,17,18, or 19. So now let's look at the problem. It's saying that A. 841-> 800 which is correct because the tenths place value is 4 so you round down. It says B. 286 -> 200 which is wrong because 8 is greater than 5 so you round up. C says 9870 -> 9800 which is wrong because it would be rounded up to 9900. And D. Says 87 -> 80 which is wrong because if you look at the tenths place it is greater than 5 so you round up and it would be 90.