Which Operation?

Mrs. Smith flew 976 miles in a plane in two days. She flew 345 mile the first day. How many miles did she fly on the second day?

A total of $653 was won by three students at the art competition. Alonzo won $345. Celia won $250. Alex won the rest. How much money did Alex win?

Melvin purchased 8 packets with ten cards in each packet. Dez purchased 25 fewer cards than Melvin. How many cards did Dez purchase?

Sammy has 36 dinosaurs in one box and 19 dinosaurs in another box. She want to separate them equally among 5 boxes. How many dinosaurs will Sammy put in each box?