Rounding
Round to the nearest 10:
235
What is 240?
The school has 253 students. Over winter break, 64 students moved away, but 16 new students moved in. How many students are now in the school?
What is 205?
True or false?
329 + 113 = 330 +112
What is True
23 + 48 = __
What is 71?
87 - 53 = __
What is 34?
Round to the nearest 100
118
What is 100?
This month the fourth and fifth graders at Rosa Parks School had a contest to see who could read the most books. By the end of the month, the fourth graders read 637 books and the fifth graders read 674 books.
Which equation does NOT represent this problem?
a. 674-637 = b
b. 637 + 674 = b
c. 674 - b = 637
d. 637 + b = 674
What is b? 637 + 674 = b
True or False?
123-109 = 122-110
What is false?
134 + 60 = ___
What is 194?
156 - 138 = ___
What is 18?
Round each number to the nearest 10
66
2,762
624
What is
70
2,760
620
Nina and Ricardo designed robots. Nina's robot can run for 235 minutes before the batteries need to be recharged. Ricardo's robot can run for 187 minutes before the batteries need recharging. How much longer can Nina's robot run than Ricardo's?
What is 48 minutes?
Fill in the blank: 543 - 529 = ___ - 530
What is 544?
134 + 229 =
What is 363?
764 - 689 = ___
What is 75?
Round each number to the nearest 100
466
208
3,251
What is
500
200
3,300
Clive and his family are driving to the beach. They will drive 136 miles total. So far, they have driven 84 miles. How much farther do they have to go?
What is 52?
Fill in the blank: 543 + 529 = ___ + 530
What is 542?
236 + 462 = ___
What is 698?
709-663 = ___
What is 46?
Which two numbers below have a sum closest to 500 (choose two numbers)?
655
300
213
525
What are
300 and 213?
Tasha and her friends are in a reading contest. Last year, the winning team read 2,546 pages. Tasha has read 186 pages. Her friend Lisa has read 203 pages, and her friend Robert has read 215 pages.
1. Estimate how many more pages they need to read altogether to beat last year's winning team.
2. Exactly how many more pages do they need to read to beat last year's winning team?
What is
Tens: 1,936 pages or 1,900
Hundreds: 1,946 or 1,900
Exact answer: More 1,942 pages
543 + 399 = ___ + 400
What is 542?
765 + 347 = ____
What is 1,112?
800 - 543 = ___
What is 257?