6.7.1.3. Half Down
The half down rule rounds numbers with a fractional half down to the closest integer.
In general, a number x is rounded down to n = x - 0.5.
In general, a number x is rounded down to n = x - 0.5.
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For example, 10.5 is rounded down to 10 and - 13.5 is rounded down to -14.
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The rule only applies to fractional halves. Fractional parts higher than 0.5 are still rounded up to the next highest integer. 4.5 is rounded down to 4, but 4.6 still rounds to 5.
To enable half down rounding:
1) Tap the menu button and select Settings.
1) Tap the menu button and select Settings.
2) Tap Calculator.
3) Change the number format to Decimal to enable rounding by going to Number format.
4) Tap Decimal.
5) Set the rounding mode by tapping Rounding.
6) In the rounding options window, tap Rounding mode.
7) Tap Half down.
8) Tap Decimal digits.
9) Set the decimal digits to 0 for this example.
Examples
Find the integer part of each result using half down rounding.
1) 2.35
2) 6.5
3) 4.9
4) 4.75
5) 135 ÷ 2
1) 2.35
2) 6.5
3) 4.9
4) 4.75
5) 135 ÷ 2
Solutions
Make sure rounding is set to half down.
1) Type in 2.35
2) Type in 6.5
3) Type in 4.9
4) Type in 4.75
5) Type in 135 ÷ 2
1) Type in 2.35
2) Type in 6.5
3) Type in 4.9
4) Type in 4.75
5) Type in 135 ÷ 2
