Rounding
Round 118 to the nearest 10 and nearest 100.
Nearest 10 - 120
Nearest 100 - 100
405 + 198=?
603
182-117=?
65
In a baseball game, 258 adult tickets were sold and 125 children tickets were sold. How many tickets were sold altogether?
383 tickets
Which strategy would you use to solve this problem?
239 + 457 = 240 + 456
Give & Take
Round 366 to the nearest 10 and nearest 100.
Nearest 10 - 370
Nearest 100 - 400
Find the sum 329 + 113
442
Solve: 123 – 109
14
In a zoo there are 567 amphibians and 343 reptiles. How many more amphibians than reptiles are there?
224 more amphibians
Which strategy would you use to solve this problem?
499 - 404= 500 -405
Constant Difference
Round 449 to the nearest 10 and nearest 100.
Nearest 10 - 450
Nearest 100 - 400
Estimate and then find the real sum of this problem.
326+229=?
Estimation - 560
Real Answer - 555
Estimate and then find the real answer of this problem.
583-322=?
Estimation - 260
Real Answer - 261
Michael plants 439 trees. Mrs. Pettine plants 369 trees. How many trees did they plant in all?
808 trees
Fill in the blank.
201 + 399= ____ + 400
201 + 399 = 200 + 400
Round 525 to the nearest 10 and nearest 100.
Nearest 10 - 530
Nearest 100 - 500
Estimate and then find the real sum of this problem.
532+276=?
Estimation - 810
Real Answer - 808
Find the difference
752-419=?
333
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. How many more books did the fifth graders read than the fourth graders?
37 books
678 - ____ = 680 - 400
678 - 398 = 680 -400
Round 2,861 to the nearest 10 and nearest 100.
Nearest 10 - 2,860
Nearest 100 - 2,900
Estimate and then find the real sum of this problem.
628+397=?
Estimation - 1,030
Real Answer - 1,025
Solve
931-486=?
Real Answer - 445
There were 363 books in the third grade class library. Last week, 94 books were checked out, and 26 books were returned. How many books are in the third grade
class library now?
295 books
679 + 542 = 680 + ___
679 + 542 = 680 + 543