CHALLENGING MENTAL ADDITION
125 + 178
303
250 – 127
123
Round 77 to the nearest ten.
80
Estimate: 38 + 62 (round to nearest ten).
40 + 60 = 100
The school collected 347 cans for a food drive. About how many cans did they collect when rounded to the nearest ten?
350
689 + 432
1,121
900 – 468
432
Round 6,742 to the nearest thousand.
7,000
Estimate: 784 + 329 (round to nearest hundred).
800 + 300 = 1,100
A school library has 1,648 books. The librarian wants to tell students approximately how many books are in the library. Round the number to the nearest hundred.
1,600
1,345 + 2,468
3,813
1,560 – 789
771
Round 52,481 to the nearest thousand.
52,000
Estimate: 1,296 – 587 (round to nearest hundred).
1,300 – 600 = 700
A zoo had 7,583 visitors last year. About how many visitors did the zoo have, rounded to the nearest thousand?
8,000
468 + 257
725
640 – 289
351
Round 1,249 to the nearest hundred.
1,200
Estimate: 429 – 167 (round to nearest ten).
430 – 170 = 260
A school fundraiser raised $26,749. The principal wants to announce the amount to the nearest thousand dollars. What amount should she announce?
$27,000
2,508 + 3,497
6,005
4,203 – 2,679
1,524
Round 395,678 to the nearest ten thousand.
400,000
Estimate: 4,587 + 3,286 (round to nearest thousand).
5,000 + 3,000 = 8,000
A stadium can hold 48,500 people. During a concert, 43,761 people attended. The newspaper reported that about 44,000 people attended.
To what place was the attendance rounded?
nearest thousand