Mental Math
Find the sum of 80 and 57.
137
54+12
66
99 + 88
187
Jade had 1,458 paper clips. She had 396 fewer paper clips than Pedro. a How many paper clips did Pedro have?
Pedro had 1,854 paper clips.
Find the sum of 54 and 92.
146
567 + 2,102
2,669
579 + 879
1,458
A shop sold 2,390 bottles of water on Saturday. 350 more bottles were sold on Sunday than on Saturday. How many bottles of water were sold on Sunday?
2,740 bottles of water were sold on Sunday
Find the sum of 435 and 75.
510
43 + ___ = 98
55
4,563 + 9,789
14,352
There are 5,740 visitors at Exhibition A. There are 2,871 visitors at Exhibition B. Another 1,388 visitors arrive at Exhibition B. How many visitors are there at Exhibition B now?
There are 4,259 visitors at Exhibition B now
Find the sum of 58 and 192.
...then add 10.
260
Find each missing digit: A5B + BA2 = 786
A=3
B=4
Identify the mistake: 384 + 443 = 727
827
Ms. Lopez had some money. She spent half of her money and gave $300 to her mother. If Ms. Lopez had $1,878 left, how much money did she have at first?
She had $4,356 at first.
Find the sum of 83 and 57.
...then add 25. What is the final sum?
160
Find each missing digit: 7,AB2 + 24B = 7,B97
A=3
B=5
Identify the mistake: 184 + 460 = 544
644
There are 3,422 fiction books, 1,451 non-fiction books, and 595 audiobooks in Fairmount Library. Estimate the total number of books in the library by rounding to the nearest hundred.
About 5,500