3). (1 point each) Evaluate these expressions for: d = +8 e = +4 f = - 2:

a). d/e = _______ . |
b). de = _______ . |

c). f + d = _______ . |
d). f + d - e = _______ . |

e). 4e + 3d = _______ . |
f). 8d - 9e = _______ . |

g). f + e = _______ . |
h). 8de = _______ . |

i). 5ed = _______ . |
j). e/d = _______ . |

k). f + 2e = _______ . |
l). d9/e = _______ . |

4). (1 point each) Evaluate these expressions for: a = 1/2 b = 1/4 c = 1/3

a). a + b = ______. |
b). ab = ______. |

c). a - b = ______. |
d). abc = ______. |

e). ac = ______ |
f). 2a = ______ |

Answer: ____________

6). (3 points)[Extra credit]2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,91,97.

find 2 two-digit prime numbers whose digits sum to 7.

Answer: ____________