Ch. 3 Comparing, Ordering, and Rounding Decimals
0
Thousandths
Hundredths
Tenths
0
5
Hundredthousandths
3
Tenthousandths
2
Ones
Tens
Hundreds
Thousands
**All numbers to the right of the decimal are in the “ths” place:
Place Value
4
3
Rounding:
1. Underline the place value that you are rounding to
a. Round to the hundredths
23.00543
2. Look at the # behind it- if it is 5 or greater, round up. If it is less than 5, keep
the same.
b. 23.00543 (go up)
3. Write the new number using all zeros after the number you changed.
c. 23. 01000
Examples to try:
1. 3.9043 Round to the hundredths 3.9000
2. 4.097 Round to the tenths 4.100
3. 18.006789 Round to the thousandths 18.007000
Ordering (2 different ways of ordering):
1. Line up all numbers with decimals underneath each other. Order from left to right.
Ex. 4.03, 4.1, 4.37, 4.037
4.03
smallest (because of the 0)
4.1
4.37
largest (because of the 3)
4.037
OR
2. Make all the numbers have the same amount of numbers, compare after the
decimal.
Ex. 4.03, 4.1, 4.37, 4.037
4.030, 4.100, 4.370, 4.037
370 is the largest after the decimal so that number is the greatest…30 is the
smallest so that number is the least.