The document covers rounding decimals to specified place values and includes examples and exercises for rounding to the nearest hundredths and thousandths. It also discusses basic facts about the solar system, noting that Mercury is the smallest planet and closest to the sun. Additionally, it provides details on Mercury's orbital speed and relates it to its name from Roman mythology.

1. Mathematics 3
Rounding Decimals to the
Nearest Thousandths

2. Give the place value and value
of the digit 6 in each number.
14.2516 Ten thousandths
217.6281 Tenths
258.9162 Thousandths

3. Give the place value and value
of the digit 6 in each number.
351.0681 Hundredths
61.0910 Tens

4. Round off the given decimals to
the nearest hundredths.
1.) 14. 556 2.) 723.253
3.) 175.2319 4.) 4.3882
5.) 365.4419
14.56 723.25
175.23 4.39
365.44

5. How many planets are there in
the solar system?
What are the planets in the solar
system?
What is the smallest planet?
On what planet does life exist?

6. Among the eight planets in the Solar System,
Mercury is the smallest and closest to the sun with an
orbital period of about 88 Earth days. Seen from the
Earth, it appears to move around its orbit in about
116 days which is much faster than any planet. This
rapid motion may have led to it being named after
the Roman deity Mercury, the fast-flying messenger
to the gods. Mercury revolves around the sun at a
speed of about 48.8692 km per second. Round this
number to the nearest thousandths.

7. Round each decimal to the indicated place value. Write
RU if you have to round up, and write RD if you need to
round down. Then write the rounded number.
A. Round each decimal to the nearest thousandths.
1) 51.7329 = _____
2) 37.5962 = _____
3) 30.3617 = _____
4) 12.6458 = _______
5) 46.2143 = _______