题目

A fish that lives in America can live out. of water for months at a time, similar to how animals got used to land millions of years ago, a new study shows.The Mangrove Rivulus, a kind of little fish, lives in small pools of water. When their living place dries up, they live. on the land, said Scott Taylor, a researcher in Florida. The fish can grow as large as three inches. They group together and breathe air through their skin before they can find water again.The new scientific discovery came during a trip. We were travelling for fun. and one day I kicked over a log (圆木) and the fish cam（1）（-3.14）+（+4.96）+（+2.14）+（-7.96）（2）（-158）÷（-235）    （3）（-78）×217（4）（-913）-|-456|+|0-516|-23             （5）（-81）÷（+36）×（-223）（6）（-12）×0÷（-35）×（-123）                        （7）2×（-3）-3÷（-12）-（-2）3．