Learn: Different strategies to round decimals
First: Midpoint strategy
Example 1
a. Rounding 19.7 [to the nearest whole number]
b. Rounding 4.62 [to the nearest Tenth]
c. Rounding 8.765 [to the nearest Hundredth]
Second: Rounding rule strategy
Example 2
Use rounding rule strategy to round the decimal number 18.5376 to the nearest whole number, Tenth, Hundredth and Thousandth.
Solution
[to the nearest whole number]
[to the nearest Tenth]
[to the nearest Hundredth]
[to the nearest Thousandth]
Example 3
Round each number to the place of the underlined digit:
a.
b.
c.
d.
e.
f.
g.
h.
Solution
a.
b.
c.
d.
e.
f.
g.
h.
Example 4
Solution
a. To write the smallest decimal less than one, put the decimal point [0.], then write the given digits arranged ascendingly from the left to the right. The smallest decimal less than one = 0.2346
- [to the nearest Hundredth]
- [to the nearest Thousandth]
b. To write the greatest decimal, less than one, put the decimal point [0.], then write the given digits arranged descendingly from the left to the right. The greatest decimal less than one = 0.9752
- [to the nearest Hundredth]
- [to the nearest Thousandth]
Check your understanding
Round each number to the place of the underlined digit.
a. = ___
b. = ___
c. = ___
d. = ___
e. = ___
f. = ___
g. = ___
h. = ___
i. = ___