6.7.1.8. Half Up
The half up rule states that a number x with a fractional half will be rounded to n = x + 0.5. 2.5 is rounded up to 3, 3.5 is rounded to 4, and 5.5 is rounded to 6. -2.5 is rounded to -2, -3.5 is rounded to -3, and -4.5 is rounded to -4.
The rule only applies to fractional halves. Numbers with a decimal part higher than 0.5 are still rounded to the next highest integer, and those lower than 0.5 are rounded to the next lowest integer. For example, 4.5 is rounded to 5 but 4.2 is rounded to 4.
The rule only applies to fractional halves. Numbers with a decimal part higher than 0.5 are still rounded to the next highest integer, and those lower than 0.5 are rounded to the next lowest integer. For example, 4.5 is rounded to 5 but 4.2 is rounded to 4.
To enable half up rounding:
1) Tap the menu button and select Settings.
1) Tap the menu button and select Settings.
2) Tap Calculator.
3) Tap Number format.
4) Set the number format to Decimal to enable rounding.
5) Tap Rounding.
6) Tap Decimal digits.
7) Set the decimal digits to 0.
8) Tap Rounding mode.
9) Set the rounding mode to Half up.
Go back to the calculator window using the back arrow in the top left.
Examples
Find the integer part of each number using half up rounding.
1) 3.5
2) 5.5
3) 8.5
4) 9.5
5) 4.5
6) 4.2
7) 4.7
8) –2.5
9) –3.5
10) –4.5
Find the integer part of each number using half up rounding.
1) 3.5
2) 5.5
3) 8.5
4) 9.5
5) 4.5
6) 4.2
7) 4.7
8) –2.5
9) –3.5
10) –4.5
Solutions
Make sure rounding is set to half up.
1) Type in 3.5
2) Type in 5.5
3) Type in 8.5
4) Type in 9.5
5) Type in 4.5
6) Type in 4.2
7) Type in 4.7
8) Type in –2.5
9) Type in –3.5
10) Type in –4.5
Make sure rounding is set to half up.
1) Type in 3.5
2) Type in 5.5
3) Type in 8.5
4) Type in 9.5
5) Type in 4.5
6) Type in 4.2
7) Type in 4.7
8) Type in –2.5
9) Type in –3.5
10) Type in –4.5
