Upload
solomon-mccormick
View
217
Download
0
Embed Size (px)
Citation preview
Rounding Numbers
70 80
7477
600 700
630
660
The Rule
Look at the number to the right of the rounding number. If that number is 0, 1, 2, 3, or 4, do not change the rounding number. All the numbers on the right side of the rounding number will become 0.
Round 64 to the nearest 10.
Look at the number to the right of the tens place.
Since the number is 4, leave the 6 as it is and change the 4 to 0.
60
The Rule
If the number to the right of the rounding number is 5, 6, 7, 8, or 9, the rounding number rounds up one number. All the numbers to the right of the rounding number become 0.
Round 270 to the nearest 100.
Look at the number to the right of the hundreds place.
Since the number is 7, round up the 2 and make it 3. Then make the other two numbers 0.
300
60 70
65
6162
63
64 66
67
68
69
Rounding to the Nearest 10
300400
350
310320
330
340 360
370
380
390
Rounding to the Nearest 100
Now it’s your turn!
Round 37 to the nearest 10.
A. 30B. 40C. 35D. 25
1 2 3 4 5
Round 23 to the nearest 10.
A. 20B. 25C. 30D. 35
1 2 3 4 5
Round 670 to the nearest 100.
A. 500B. 600C. 650D. 700
1 2 3 4 5
Round 734 to the nearest 100.
A. 600B. 750C. 800D. 700
1 2 3 4 5
28 students are in Mrs. Smith’s class. About how many students are in her class?
A. 20B. 30C. 40D. 50
1 2 3 4 5
There are 132 pencils in the box. About how many pencils are in the box?
A. 100B. 200C. 300D. 50
1 2 3 4 5