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Rounding Numbers to the Closest Ten by Debbie Wilks
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Rounding Numbers to the Closest Ten by Debbie Wilks.

Dec 29, 2015

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Page 1: Rounding Numbers to the Closest Ten by Debbie Wilks.

Rounding Numbersto the

Closest Ten

by Debbie Wilks

Page 2: Rounding Numbers to the Closest Ten by Debbie Wilks.

When you find the ten that is closest to a number, you are

rounding.

Page 3: Rounding Numbers to the Closest Ten by Debbie Wilks.

For example, 40 is the closest ten to 36.

So, 36 is rounded to 40.

Page 4: Rounding Numbers to the Closest Ten by Debbie Wilks.

Let’s think about a number line like a

roller coaster.

Page 5: Rounding Numbers to the Closest Ten by Debbie Wilks.

You might think about a number line that

looks like this:

10 3020

Page 6: Rounding Numbers to the Closest Ten by Debbie Wilks.

On this number line, what number would come half way between 10 and 20?

10 3020

15

Page 7: Rounding Numbers to the Closest Ten by Debbie Wilks.

What number would come half way between 20 and

30?

10 3020

15

25

Page 8: Rounding Numbers to the Closest Ten by Debbie Wilks.

What ten would be next?

10 30

20

15 25 35

40

What number would be half way between?

Page 9: Rounding Numbers to the Closest Ten by Debbie Wilks.

Can you guess about where 17 would be

on this number line?

10

30

20

15 25 35

40

17

Page 10: Rounding Numbers to the Closest Ten by Debbie Wilks.

10

30

20

15 25 35

40

17

If the roller coaster stopped, what number

would it roll to?

Page 11: Rounding Numbers to the Closest Ten by Debbie Wilks.

Can you guess about where 23 would be

on this number line?

10

30

20

15 25 35

40

23

Page 12: Rounding Numbers to the Closest Ten by Debbie Wilks.

10

30

20

15 25 35

40

23

If the roller coaster stopped, what number

would it roll to?

Page 13: Rounding Numbers to the Closest Ten by Debbie Wilks.

Can you guess about where 36 would be

on this number line?

10

30

20

15 25 35

40

36

Page 14: Rounding Numbers to the Closest Ten by Debbie Wilks.

What would you round it to?

10

30

20

15 25 35

40

36

Page 15: Rounding Numbers to the Closest Ten by Debbie Wilks.

Can you guess about where 41 would be

on this number line?

10

30

20

15 25 35

40

41

Page 16: Rounding Numbers to the Closest Ten by Debbie Wilks.

What would you round it to?

10

30

20

15 25 35

40

41

Page 17: Rounding Numbers to the Closest Ten by Debbie Wilks.

Can you guess about where 19 would be

on this number line?

10

30

20

15 25 35

40

19

Page 18: Rounding Numbers to the Closest Ten by Debbie Wilks.

Can you guess about where 19 would be

on this number line?

10

30

20

15 25 35

40

19

Page 19: Rounding Numbers to the Closest Ten by Debbie Wilks.

10

30

20

15 25 35

40

19

What would you round it to?

Page 20: Rounding Numbers to the Closest Ten by Debbie Wilks.

What about a number like 25? It’s right in the middle!

10

30

20

15 25 35

40

Page 21: Rounding Numbers to the Closest Ten by Debbie Wilks.

Our rule is to round to the next ten.

10

30

20

15 25 35

40

Page 22: Rounding Numbers to the Closest Ten by Debbie Wilks.

10

30

20

15 25 35

40

Tell a number that would round to 10.

1112

1314

Page 23: Rounding Numbers to the Closest Ten by Debbie Wilks.

When you round to the closest ten, look in the ones place.

If it has 1,2,3, or 4 round down.If it has 5, 6 ,7, 8, or 9 round up.

Page 24: Rounding Numbers to the Closest Ten by Debbie Wilks.

To round remember this rhyme,

5, 6, 7, 8, 9

GO UP all the time!!

Page 25: Rounding Numbers to the Closest Ten by Debbie Wilks.

Rounding numbers is so fun,We will do it 'till we're done.

If a number's 1-4,Round it down right through the

floor.If a number's 5-9,

Round it up it is just fine. Round up,

Round down, 1,2,3,4 --- 1-2, 3-4

Page 26: Rounding Numbers to the Closest Ten by Debbie Wilks.

Now it’s your turn!

You can get some help from the number line.

Page 27: Rounding Numbers to the Closest Ten by Debbie Wilks.

What ten is closest to 56?

Put your bean on the closest ten.

Page 28: Rounding Numbers to the Closest Ten by Debbie Wilks.

What ten is closest to 79?

Put your bean on the closest ten.

Page 29: Rounding Numbers to the Closest Ten by Debbie Wilks.

What ten is closest to 83?

Put your bean on the closest ten.

Page 30: Rounding Numbers to the Closest Ten by Debbie Wilks.

What ten is closest to 99?

Put your bean on the closest ten.

Page 31: Rounding Numbers to the Closest Ten by Debbie Wilks.

What ten is closest to 65?

Put your bean on the closest ten.

Page 32: Rounding Numbers to the Closest Ten by Debbie Wilks.

What ten is closest to 94?

Put your bean on the closest ten.

Page 33: Rounding Numbers to the Closest Ten by Debbie Wilks.

Are you roller

coaster ready for an assignment

?