Word Problems: Addition and Subtraction

I can choose the correct operation to solve a word problem.I can solve a word problem with addition and subtraction. Krish had 52 marbles. He gave 21 to Aman and 8 to Joanna. How many marbles does Krish have now? Show your strategy and solve the problem. 23 81 29 This morning, there were 26 fish in an aquarium and 32 fish in the other aquarium. At noon, 11 fish were sold. How many fish are left in the aquariums? 53 fish 47 fish 69 There are 44 people on the train. At the first stop, 16 more people got on the train. 19 people got off the train. How many people are on the train? 19 people 29 people 25 people My mom baked 36 cookies for the bake sale. I baked 24 cookies. My brother ate 5 cookies. How many cookies are there for the bake sale? 55 cookies 53 cookies 65 cookies There are 52 cars in the movie theater parking lot. 12 more cars parked in the parking lot before the movie started, but 13 cars left. How many cars are in the parking lot? 53 cars 51 cars 53 cars Mary found 68 seashells on the beach. she gave Keith 19 of the seashells. Sarah gave her 5 seashells. How many seashells does she now have ? Explain your strategy and thinking below.