Problem Solving with 3- and 4-Digit Numbers
Addition and Subtraction, and more...

Lisa loves to collect stamps. Amazingly, she has collected 290 stamps from Canada, 31 stamps from China, 212 stamps from America, and 15 stamps from France. How many stamps does Lisa have in total?


There were 1908 blueberries on a blueberry bush. After a bunch of birds came by and feasted on the blueberries for lunch, there were 1671 blueberries left. How many blueberries did the birds eat in total?