Transcript PowerPoint for Rounding - Junction Hill C

Rounding
Tens, Hundreds, Thousands,
By: Brenda Tapson
Round when:
• You have been asked to estimate.
• Look for the clue word “about”.
• You need an easier number to
work with.
Rounding Poem
Find your number.
Look next door.
If 4 or less, just ignore.
If 5 or more, add 1 more.
Round to the nearest ten.
Find your number.
37
Underline your number.
Round to the nearest ten.
Look next door.
37
Draw an arrow to the “next door” number.
Round to the nearest ten.
If 4 or less, just ignore.
37
7 is more than 4, so move to the next line
of the poem.
Round to the nearest ten.
If 5 or more, add 1 more.
37
40
7 is more than 5. Add 1 more to the underlined
number and the rest become zero’s.
Round to the nearest ten.
Find your number.
2,442
Underline your number.
Round to the nearest ten.
Look next door.
2,442
Draw an arrow to the “next door” number.
Round to the nearest ten.
If 4 or less, just ignore.
2,442
2,440
2 is less than 4. Leave the underlined number alone
and the rest are zero’s.
Let’s Try It!
77
23
54
65
80
20
50
70
Let’s Get Tougher!
285
195
157
679
290
200
160
680
Round to the nearest hundred.
Find your number.
473
Underline your number.
Round to the nearest hundred.
Look next door.
473
Draw an arrow to the “next door” number.
Round to the nearest hundred.
If 4 or less, just ignore.
473
7 is more than 4, so move to the next line
of the poem.
Round to the nearest hundred.
If 5 or more, add 1 more.
473
500
7 is more than 5. Add 1 more to the underlined
number and the rest of the numbers become
zero’s.
Let’s Try It!
569
915
1,283
5,617
600
900
1,300
5,600
Round to the nearest thousand.
Find your number.
5,689
Underline your number.
Round to the nearest thousand.
Look next door.
5,689
Draw an arrow to the “next door” number.
Round to the nearest hundred.
If 4 or less, just ignore.
5,689
6 is more than 4, so move to the next line.
Round to the nearest hundred.
If 5 or more, add 1 more.
5,689
6,000
6 is more than 5. Add 1 more to the underlined
number and the rest of the numbers become
zero’s.
Let’s Try It!
3,334
38,288
5,790
15,699
3,000
38,000
6,000
16,000