Addition
10 + 72
82
26 - 16
10
45
50
497
500
Sarah has 25 apples. She buys 17 more apples from the store. How many apples does Sarah have now?
42 apples
56 + 456
512
72-36
36
23
20
339
300
Tom had 48 marbles. He gave 19 marbles to his friend. How many marbles does Tom have left?
29 marbles
452 + 432
884
459 - 291
168
239
240
673
700
There are 73 students in a school auditorium. Round this number to the nearest 10.
70
1,941 + 3,049
4,990
952 - 763
189
755
760
2,356
2,400
A library has 1,245 books. They receive 678 new books. About how many books does the library have now if you round to the nearest 100?
total books : 1,923
Rounded to the nearest hundred : 1,900
12,705 + 10,481
23,186
4,591 - 2,682
1,909
1,291
1,290
1,723
1,700
A factory produced 3,482 toys last month. This month, it produced 2,759 toys. About how many fewer toys did the factory make this month compared to last month, rounded to the nearest 100?
difference : 723
rounded to the nearest hundred : 700