When we plot these numbers on a number line we observe that12 lies between 10 and 20. Also 12 is nearest to 10 than 20. So, we round off12 as 10, correct to the nearemainder 10s.

If we take into consideration 19, we observe that it is nearer to 20 than10. So, we round off 19 to 20, correct to the nearest tens.

You are watching: Round 25 to the nearest 10

Now, let us think about the number 15. If we plot this number on number line we uncover that 15 lieshalf-way between 10 and 20. By convention, we round off 15 to 20.

Now we will certainly learn exactly how to estimate the number 23, 27 and also 29. Look at the arrowhead at 23. It is nearer to 20 than 30 because23 - 20 = 3 while 30 – 23 = 7. We take 23 as 20 when we estimate it to thenearemainder 10. Aobtain, look at the arrowhead at 27. The arrow at 27 is nearer to30 than 20 bereason 30 – 27 = 3 and 27 – 20 = 7. So, 27 is taken as 30. In the very same way, look at the arrow at 29. It is nearer to 30than 20 bereason 30 - 29 = 1 while 29 – 20 = 9. So, 29 is taken as 30 because itis near to 30 than 20.

How will we round off the number 25?

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

1. Round off to thenearest tens:

(i) 362

The offered number is 362.

Its ones or unit digit is 2, which is less than 5. So, wereplace the ones digit by 0 to acquire the rounded off number.

Hence, rounded off number = 360.

(ii) 909

The offered number is 909.

Its ones or unit digit is 9, which is better than 5. So, werise the tens digit by 1 and rearea the ones digit by 0 to gain the roundedoff number.

Hence, rounded off number = 910.

2. How toestimate 2534 to the nearemainder 10?

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

From the over examples, to estimate to nearest 10s we cangeneralize that,

(i) the numbers having actually 1, 2, 3, 4 at ones or systems place arerounded off downwards.

(ii) the numbers having actually 5, 6, 7, 8, 9 at ones or devices placeare rounded off upwards.

See more: How Many Months Are In 100 Years Converter, Years To Months