How do you round a number in maths?
Here’s the general rule for rounding:
- If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up. Example: 38 rounded to the nearest ten is 40.
- If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 33 rounded to the nearest ten is 30.
What is the golden rule for rounding numbers?
Rounding is a procedure for estimating. 5 is the golden rule: 0,1,2,3,4 round down, and 5,6,7,8 and 9 round up. See the fact file below for more information on the rounding off numbers or alternatively, you can download our 22-page Rounding off Numbers worksheet pack to utilise within the classroom or home environment.
How do you teach number rounding?
The best way to start is by modeling rounding using two-digit numbers and showing children how to round to the nearest ten. Working with your child, ask him or her to think of a number being rounded, and ask what comes before and after that number, and fill in only those two numbers.
How do you round to the nearest whole number?
To round a number to the nearest whole number, you have to look at the first digit after the decimal point. If this digit is less than 5 (1, 2, 3, 4) we don’t have to do anything, but if the digit is 5 or greater (5, 6, 7, 8, 9) we must round up.
What is the rhyme for rounding?
Rounding Rhyme- Four or less let it rest, five or more let it sore. Four or less let is rest and Five or more let it soar are great rounding rhymes to help students remember the rules for rounding. Hang these posters around your classroom or even make copies for students to paste in their notebooks! Enjoy!
What is 7.4 rounded to the nearest whole number?
7
So, 7.4 rounded to the nearest whole number is 7, and 7.9 rounded to the nearest whole number is 8.
What is 4.0 rounded to the nearest whole number?
4
If you want to round to the nearest whole number — another way of saying to the unit or ones digit — you will look to the first digit to the right of the decimal point. That’s right, that’s the tenth digit. 4.0 rounds to 4 because the 0 is less than 5. 4.3 also rounds to 4 because 3 is less than 5.