When we plot this numbers ~ above a number line we observe that12 lies between 10 and 20. Also 12 is nearest to 10 than 20. So, we round off12 together 10, correct to the nearest tens.

If we consider 19, us observe that it is nearer come 20 than10. So, us round turn off 19 come 20, exactly to the nearest tens.

You are watching: 25 rounded to the nearest ten

Now, let us think about the number 15. If us plot this number on number heat we discover that 15 lieshalf-way in between 10 and also 20. Through convention, we round off 15 come 20.

Now we will learn exactly how to calculation the number 23, 27 and 29. Look at the arrow at 23. That is nearer to 20 than 30 because23 - 20 = 3 while 30 – 23 = 7. Us take 23 as 20 once we calculation it to thenearest 10. Again, look in ~ the arrow at 27. The arrow at 27 is nearer to30 than 20 due to the fact that 30 – 27 = 3 and also 27 – 20 = 7. So, 27 is taken as 30. In the same way, look at the arrowhead at 29. That is nearer come 30than 20 because 30 - 29 = 1 when 29 – 20 = 9. So, 29 is taken as 30 because itis close to to 30 보다 20.

How will certainly we round off the number 25?

25 is equal distance from 20 and 30. Through convention it istaken as 30.

1. Round turn off to thenearest tens:

(i) 362

The offered number is 362.

Its persons or unit number is 2, i beg your pardon is less than 5. So, wereplace the ones number by 0 to acquire the rounded turn off number.

Hence, rounded off number = 360.

(ii) 909

The provided number is 909.

Its persons or unit digit is 9, which is higher than 5. So, weincrease the 10s digit by 1 and replace the ones digit by 0 to obtain the roundedoff number.

Hence, rounded turn off number = 910.

2. exactly how toestimate 2534 to the nearest 10?

34 is nearer to 30 than 40, therefore 2534 is taken as 2530.

From the above examples, to calculation to nearest tens we cangeneralize that,

(i) the numbers having actually 1, 2, 3, 4 at ones or units location arerounded turn off downwards.

(ii) the numbers having 5, 6, 7, 8, 9 in ~ ones or systems placeare rounded turn off upwards.

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