1.  Cheryl has 31 teddy bears. She gives away 16 of them to her best friend. How many teddy bears does she now have?   2. A pond contains 281 fish of which 30 are stationary. How many fish in the tank are moving?   3. There are 309 birds in a sanctuary of which 10 are blue. How many birds are there of other colors?   4. A jungle has 840 deer. There are 481 spotted deer. How many deer do not have spots?   5. A magician starts with 28 rabbits and makes 16 rabbits vanish. How many rabbits remain?