A stick of absent is 23 cm. Exactly how long is it to the nearest 10 cm? Look in ~ this number line:

You can see that 23 is in between 20 and also 30, yet it’s closer to 20. So 23 is rounded down to 20. Therefore the rod of absent is 20 cm lengthy when we round it to the nearest 10 cm.

The elevation of a book is 67 cm. Just how high is it come the nearest 10 cm? Look in ~ this number line:

You deserve to see 67 is between 60 and 70, but it’s closer come 70. Therefore 67 is rounded as much as 70. For this reason the elevation of the book is 70 cm once we round it to the nearest 10 cm. Yet what if we had actually a rod of absent 35 cm long? 35 is half way between 30 and 40. The dominion is that 35 would be rounded as much as 40. An ext examples:

87 rounded to the nearest 10 is rounded as much as 90 

24 rounded come the nearest 10 is rounded down to 20 

45 rounded to the nearest 10 is rounded approximately 50

Rules for round off to the nearest 10:  1, 2, 3 and 4 obtain rounded under  5, 6, 7, 8 and 9 acquire rounded up

Rounding numbers to the nearest 100 What is 435 rounded to the nearest 100? Look in ~ this number line.

You have the right to see 435 is between 400 and also 500, however it’s closer to 400. When rounding come the nearest 100 look in ~ the 10s figure. If us round 435 come the nearest 100 it will certainly be rounded under to 400. What is 562 rounded to the nearest 100? Look at this number line.

You have the right to see 562 is between 500 and 600, yet it’s closer to 600. Once rounding come the nearest 100 look at the 10s figure. If we round 562 come the nearest hundred it will certainly be rounded up to 600. As with rounding to the nearest 10, if the tens figure is 5, you round up. An ext examples:

728 rounded come the nearest 100 is rounded under to 700 

283 rounded to the nearest 100 is rounded approximately 300 

350 rounded to the nearest 100 is rounded approximately 400.

Rules for rounding to the nearest 100:  if the tens figure is 1, 2, 3 and also 4 it gets rounded down  if the tens number is 5, 6, 7, 8 and also 9 it it s okay rounded up

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