Rounding
Round these numbers to the nearest 10:
77
134
535
1,931
80
130
540
1,930
True or False?
78 + 24 = 79 + 23
TRUE
Steven and Luke had a competition to see who could solve a Rubix Cube faster. Steven solved his in 484 seconds and Luke solved his in 596 seconds. Who solved it faster? How many seconds faster?
Steven, 112 seconds faster
72 - 15 = ___
57
47 + 29 = __
76
Round these numbers to the nearest 100
466
112
578
2,761
500
100
600
2,800
True or False?
223 - 209 = 222 - 210
FALSE
Mrs. Warner and Ms. E baked some 265 cookies. They gave the class 84 cookies, but then made 17 more cookies. How many cookies do they have now?
198 cookies
324 - 25 = ___
299
139 + 48 = __
187
Round these numbers to the nearest 10
95
792
5,835
7,992
100
790
5,840
7,990
Fill in the blank:
573 + 149 = ___ + 150
572
Luca and Sarah went apple picking. Sarah picked 369 apples and Luca picked 278 apples. How many more apples did Sarah pick?
91 apples
172 - 124 = ___
48
236 + 499 = __
735
Round to the nearest 100
9,850
550
72
439
9,900
600
100
400
Fill in the blank:
733 - 149 = __ - 150
734
Cody took a test to see how many country's flags he could name. Out of 193 countries, Cody got 112 correct. How many did he get incorrect?
81 countries
762 - 473 = __
289
678 + 223 = __
901
Which two numbers have a sum closest to 600?
460
300
170
442
170 and 442
True or False?
429 + 213 = 430 + 212
TRUE
Ms. Contento bought 485 nerds at the store. The next day, her students brought her 368 nerds. How many nerds does she have now?
853 nerds
303 - 135 = __
168
1,345 + 992 = __
2,337