to the nearest 10 Next Rounding numbers means to get close to the exact number Its used when we estimate Next Rounding to the nearest 10 20 21 22 23 24 25 26 27 28 29 ID: 466876
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Slide1
Rounding Numbers
to the nearest 10
NextSlide2
Rounding numbers means to
get close to the exact number.
It’s used when we estimate.
NextSlide3
Rounding to the nearest 10
20
21 22 23 24
25 26 27 28 29
30
These numbers round down to
20
because they are closer.
NextSlide4
Rounding to the nearest 10
20
21 22 23 24
25 26 27 28 29 30
These numbers round up to
30
because they are closer.
NextSlide5
Rounding Poem
Find your place
Look next door
4 or less… Just ignore.
5 or greater
Add one more
Next
Click to hear poem
Click to hear poemSlide6
Let’s round
39
to the nearest 10
NextSlide7
Underline the place that you want to round to…
the tens place.
3
9
NextSlide8
3
9
Look next door …
To the ones place.
NextSlide9
3
9
Circle the digit to the right…
The ones place.
NextSlide10
3
9
If the circled digit is a
1, 2, 3, 4…The underlined digit stays the same.
NextSlide11
3
9
If the circled digit is a
5, 6, 7, 8, 9…Add one to the underlined digit.
NextSlide12
3
9 becomes 40
Add one to the underlined digit….
The circled digit becomes 0.
NextSlide13
This makes sense because
39 is much closer to 40.
30
31 32 33 34 35 36 37 38
39
40
NextSlide14
T
ake another look…
Let’s round
52
to the nearest ten.
NextSlide15
Underline the digit in the tens place.
5
2
NextSlide16
5
2
Look next door...
NextSlide17
5
2
Circle the ones digit.
NextSlide18
5
2
Is it a
1, 2, 3, 4 ?
NextSlide19
5
2 becomes 50
Yes! The underlined digit stays the same and the circled digit becomes a 0.
NextSlide20
This makes sense because
52 is much closer to 50.
5
0
5
1
5
2
5
3
5
4
5
5 56 57 58 59 6
0
NextSlide21
T
ake another look…
Let’s round
75
to the nearest ten.
NextSlide22
Underline the digit in the tens place.
7
5
NextSlide23
7
5
Look next door...
NextSlide24
7
5
Circle the ones digit.
NextSlide25
7
5
Is it a 1, 2, 3, 4
?No!
NextSlide26
7
5
Is it a
5, 6, 7, 8, 9
?
YES!
NextSlide27
7
5 becomes
80
The add one to the underlined digit and the circled digit becomes a 0.
NextSlide28
This makes sense because
75 is closer to 80.
70
71 72 73 74
75
76 77 78 79
8
0
NextSlide29
Ready to give it a try?
Remember the poem if you get stuck.Good luck!
NextSlide30
Round
37 to the nearest 10.
NextSlide31
37
30
40Slide32
Oops!
Remember the rule…
Next
Click to hear poemSlide33
3
7
If the circled digit is 5, 6, 7, 8, 9…
Add one to the underlined digit
NextSlide34
37 would be closer to 40.
30
31 32 33 34 35 36
37 38 39 40
NextSlide35
Let’s try that again!
GoSlide36
Yes!
Well done!
NextSlide37
3
7
The circled digit is 5, 6, 7, 8, 9…
Add one to the underlined digit
NextSlide38
37 would be closer to 40.
30
31 32 33 34 35 36
37 38 39 40
NextSlide39
Try another!
NextSlide40
Round
83 to the nearest 10.
NextSlide41
83
80
90Slide42
Oops!
Remember the rule…
Next
Click to hear poemSlide43
8
3
If the circled digit is 1,
2, 3, 4…
The underlined digit stays the same.
NextSlide44
83 would be closer to 80.
8
0
81 82 83
8
4
8
5
8
6 87 88
8
9
9
0
NextSlide45
Let’s try that again!
GoSlide46
Yes!
Well done!
NextSlide47
8
3
The circled digit is 1,
2, 3, 4…
T
he underlined digit stays the same.
NextSlide48
83 would be closer to 80.
8
0
81 82 8
3
8
4
8
5
8
6 87 88
8
9
9
0
NextSlide49
Great job!
Now try a few on your own.
NextSlide50
Round the following numbers to the nearest 10 on paper.
When you are done, bring the paper to me.
Good Luck!
NextSlide51
Round
38to the nearest 10.
NextSlide52
Round
52to the nearest 10.
NextSlide53
Round
89to the nearest 10.
NextSlide54
Round
74to the nearest 10.
NextSlide55
Round
38to the nearest 10.
NextSlide56
Round
66to the nearest 10.
NextSlide57
Round
15to the nearest 10.
NextSlide58
You are done!
Thank you for your hard work.Please remember to bring your paper to me.