Estimate + and -
Estimate the sum by rounding.
5,317 + 1,734
7,000
14,312 + 9,617
23,929
9,128 - 3,753
5,375
8,000 - 6,280
1,720
Write the number name for 21,604.
Twenty-one thousand, six hundred four
Estimate the difference by rounding.
24,300 - 10,125
10,000
In May, 8,723 cans were recycled. In June, 6,419 cans were recycled. What is the total number of cans recycled?
15,142 cans
4,245 – 2,918 =
1,327
1,902 - 1,374
528
Factors/ Multiples/ Prime & Composite Review
Factors of 48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
Multiples of 7: 7, 14, 21, 28, 25, 42...
38 is Composite
13 is Prime
Estimate the sum by rounding.
4,225 + 98
4,130
67,435 + 2,409
69,844
There are 57,645 people at the NC State football game and 46,529 people at the UNC football game. If Sarah wants to find the difference between the two numbers of people, what would a reasonable estimate be?
Between 7,000 and 8,000 people
Between 8,000 and 9,000 people
Between 9,000 and 10,000 people
Between 11,000 and 12,000 people
Between 11,000 and 12,000 people
(the exact answer is 11,100)
6,502 - 5,380
1,122
Taylorsville has 269 fewer students than Morgantown. Morgantown has 199 more students than South Elementary. If South Elementary has 856 students how many students are at Taylorsville?
786 students at Taylorsville
Estimate the difference by rounding.
542,817 - 27,398
510,000
4,728 + 2,989 =
7,717
Joann’s fitness monitor counted 45,524 steps for the week. She walked a total of 29,698 steps by Tuesday. How many steps did she walk the rest of the week?
15,826 steps
63,000 - 48,673
14,327
The fourth grade class at Smithfield Elementary is raising money for charity. At the beginning of the week, they had $10,239. On Wednesday, a local business donated $1,252. The class received more donations on Thursday. By Friday morning, the total collection amount had reached $24,329. How much money was donated on Thursday?
$12,838 on Thursday
Round each number to the nearest thousand and find the sum.
3,825
1,297
4,175
4,000 + 1,000 + 4,000 = 9,000
There are some children at Carowinds. There are 2,315 fewer children at Discovery Place. If there are 7,072 children at Discovery Place, how many children are at Carowinds?
9,387 students at Carowinds
The Carolina Panthers are collecting toys as a service project. Cam Newton brought in 5,389 toys, Luke Kuechly brought in 2,987 toys, and Christian McCaffrey brought 3,412 toys. About how many more toys did Christian McCaffrey bring than Luke Kuechly?
about 400 more
30,900 - 22,855
8,045
Barnette is collecting books for a book drive. How many more books are needed to reach their goal of 4,400 books?
January: 982
February: 635
March: 1,937
846 more books