3 Endangered Animals (Tiger, Gorilla and Panda) Math Mystery Pictures to review the 4 operations and fractions for Earth Day or an Animal Unit Study. Each Mystery Picture has 9 different worksheets to allow you to differentiate: two sheets of mixed additions and subtractions with equations (EASY and HARD), two sheets of multiplications (EASY and HARD), two sheets of mixed multiplications and divisions with equations (EASY and HARD), two sheets of mixed 4 operations with equations (E