To round 57 to the nearest ten …
9
Rounding @lhmaths: Lesley Hall To round 57 to the nearest ten … 50 60 ... decide which two tens it lies between .. 57 ... 57 is nearer to 60. 57 rounded to the nearest ten is 60.
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To round 57 to the nearest ten …. ... decide which two tens it lies between. 50. 60. 57. ... 57 is nearer to 60. 57 rounded to the nearest ten is 60. To round 82 to the nearest ten …. ... decide which two tens it lies between. 80. 90. 82. ... 82 is nearer to 80. - PowerPoint PPT Presentation
Transcript of To round 57 to the nearest ten …
Rounding
@lhmaths: Lesley Hall
To round 57 to the nearest ten …
50 60
... decide which two tens it lies between ..
57
... 57 is nearer to 60.
57 rounded to the nearest ten is 60.
Rounding
@lhmaths: Lesley Hall
To round 82 to the nearest ten …
80 90
... decide which two tens it lies between ..
82... 82 is nearer to 80.
82 rounded to the nearest ten is 80.
Rounding
@lhmaths: Lesley Hall
To round 25 to the nearest ten …
20 30
... decide which two tens it lies between ..
25... 25 is half way – it’s not nearer to 20 or 30
25 rounded to the nearest ten is 30.
If it’s half way we always round up.
Rounding
@lhmaths: Lesley Hall
To round 326 to the nearest ten …
320
330
... decide which two tens it lies between ..
326... 326 is nearer to 330.
326 rounded to the nearest ten is 330.
3 2 6 because the 6 is bigger than 5 (half way) we round up
Rounding
@lhmaths: Lesley Hall
To round 71 to the nearest ten …
711 is less than 5 (half way) so round down to 70
71 rounded to the nearest ten is 70.
To round 679 to the nearest ten …
679 9 is greater than 5 (half way) so round up to
680
679 rounded to the nearest ten is 680.
Rounding
@lhmaths: Lesley Hall
To round 326 to the nearest hundred …
300
400
... decide which two hundreds it lies between ..
326... 326 is nearer to 300.
326 rounded to the nearest hundred is 300.
3 2 6 because the 26 is less than 50 (half way) we round down
Rounding
@lhmaths: Lesley Hall
To round 151 to the nearest hundred …
151 51 is greater than 50 (half way) so round up to
200
151 rounded to the nearest hundred is 200.
To round 679 to the nearest hundred…
679
7 is greater than 5 (half way) so round up to 700
679 rounded to the nearest hundred is 700.
(or 79 is greater than 50(half way) so round up to 700)
Rounding
@lhmaths: Lesley Hall
To round 5.8 to the nearest unit (whole number) …
5 6
... decide which two units it lies between ..
5.8... 5.8 is nearer to 6.
5.8 rounded to the nearest unit is 6.
5.8 because the 8 is greater than 5 (half way) we round up
Rounding
@lhmaths: Lesley Hall
To round 2.7 to the nearest unit …
2.77 is greater than 5 (half way) so round up to 3
2.7 rounded to the nearest unit is 3.
To round 8.26 to the nearest hundred…
8.26 2 is less than 5 (half way) so round down to 8
8.26 rounded to the nearest unit is 8.
(the 6 doesn’t matter – only look at the next digit after the whole number)
