Each of these puzzles is two puzzles in one. First, use all the digits and symbols given to form 3 correct mathematical equations. Then drop one of the digits, use the rest to form 3 different equations. An example of a solved puzzle is given below. Each puzzle below has a unique solution. All puzzles copyright Erich Friedman, 2010.

0 1 1 1 2 3 4 7 7 9 + + × = = = | → | 0 + 1 = 1 1 + 2 = 3 7 × 7 = 49 drop 0 2 + 7 = 9 3 + 4 = 7 1 × 1 = 1 |

A. 1 2 3 4 5 5 6 8 9 9 + × × = = = | B. 1 1 2 2 2 4 4 5 7 7 + + × = = = |

C. 1 1 3 4 5 5 6 6 7 8 + + × = = = | D. 0 1 2 3 4 5 6 6 8 8 + × × = = = |

E. 2 2 3 4 4 5 7 8 8 9 + + × = = = | F. 1 2 3 4 5 6 7 7 7 9 + + × = = = |

G. 1 1 1 2 4 4 5 6 8 9 + × × = = = | H. 0 1 2 2 4 5 7 7 8 9 + + × = = = |

I. 0 2 2 2 3 4 4 6 6 7 7 + × × = = = | J. 0 1 2 2 4 4 4 5 5 7 9 + + × = = = |

K. 0 2 3 4 5 6 6 6 7 8 9 + × × = = = | L. 0 1 1 1 2 2 3 5 6 7 9 + × × = = = |

M. 0 1 1 2 3 5 7 7 7 9 9 + + × = = = | N. 0 1 2 3 3 5 6 8 8 9 9 + × × = = = |

See the solutions.