Place Value
The 8 in 80 is worth....
80
What is 78 rounded to the nearest tens?
80
463+289
600
78-36=?
42
1yd=3ft
How many feet are in 10 yds?
30
The 0 in 30,983 is worth...
0
What is 128 rounded to the nearest hundreds?
100
399+340+239
800
56+33=?
89
l+l+w+w=perimeter.
If the length of a rectangle is 4in and the width is 8in, what is the perimeter?
24in
The 7 in 573,090 is worth...
700,000
What is 450,076 rounded to the nearest hundred-thousand?
500,000
On Sunday 489 people were at the lake. On Monday there was 782 people, and 513 on Wednesday. How many people in all were at the lake? Use Front-End estimation to solve this problem
1600
568+345=?
913
1ft=12in
How many feet are in 108 inches?
9 Feet
The value of 8 in 56,982 is ______ times as large as the value of 8 in 156,408
10
13,000
The teachers at Willard School held a reading contest. All the students would receive a free book if they read a combined total of 20,000 by the end of the year.
First Quarter: 6,520 books were read
Second Quarter: 5,870 books were read
Third Quarter: 4,460 books were read
Fourth Quarter: 4,780 books were read
Have the students read enough books?
Yes!
ex. 7000+6000+4,000+5,000 (Rounding to nearest thousands)
425-278=?
147
<,>, or =
63,999______63,989
63,999 > 63,989
Write the number that has...
7 in the thousands place
6 in the ten-thousands place
5 in the hundreds place
8 in the ones place
3 in the tens place
67,538
What is 9 rounded to the nearest tens?
10
Workers in a toy factory make stuffed raccoons. The goal is to make at least 1,200 raccoons every 3 hours. In hour 1 they made 427 raccoons. In the next hour they made 443 raccoons. In the third hour they made 448 raccoons.
Did they meet the 3-hour goal?
Yes!
ex. 400+400+400=1200 (front-end estimation)
605-357=?
248
1yd=3ft
1ft=12in
How many inches are in 5 yards?
180 inches