CHECKING OF ASSIGNMENTS
EXCHANGE NOTEBOOK WITH
YOUR SEATMATES
ROUNDING OFF DECIMALS
TENTHS
HUNDREDTHS
THOUSANDTHS
3.923 3.923
3.923 3.923
3.923 3.923
1. If the first number to be eliminated is less
than 5, simply drop it (and the number to
the right of it) and let the last significant
digit stand.
Example: Round off 25.4 mm to the whole millimeter.
Solution: Simply drop the .4
Answer: 25
Example: Round off 0.3125 (5/16) into two significant digits.
Solution: The first number to be eliminated is 2
Simply drop it and all numbers to its right(5)
Answer: 0.31
2. If the number to be eliminated is 5 or more,
drop the number, then add one to the last digit
retained.
Example: a. Round off 78.6 into its nearest ones.
Solution: The number to be rounded
off is 6 which is greater than 5, drop 6, and add
one to the last digit retained.
Answer: 79
b. Round off 92.65 into its nearest tenths.
Solution: The number to be rounded off is 5,
drop 5, and add one to 6 which is the last
digit retained.
Answer: 92.7
ACTIVITY
ALPHABET OF LINES
DIMENSION LINE
PHANTOM LINE
LONG BREAK LINE
SECTION LINE
LEADER LINE
VISIBLE LINE
CENTER LINE
HIDDEN LINE
CUTTING PLANE LINE
SHORT BREAK LINE
EXTENSION LINE