B1: a|A=5,6+{-7,3}-15,6+{-65,7} b|B=3,5.{-31,7}+45,9.0,6+3,5.21,7-0,6.{-54,1}

Bởi

B1:
a|A=5,6+{-7,3}-15,6+{-65,7}
b|B=3,5.{-31,7}+45,9.0,6+3,5.21,7-0,6.{-54,1}

0 bình luận về “B1: a|A=5,6+{-7,3}-15,6+{-65,7} b|B=3,5.{-31,7}+45,9.0,6+3,5.21,7-0,6.{-54,1}”

  1. a) $5,6+(-7,3)-15,6+(-65,7)$

    $=5,6-7,3-15,6-65,7$

    $=(5,6-15,6)+(-7,3-65,7)$

    $=-10-73=-83$

    b) $3,5.(-31,7)+45,9.0,6+3,5.21,7-0,6.(-54,1)$

    $=[3,5.(-31,7)+3,5.21,7]+[45,9.0,6-0,6.(-54,1)]$

    $=[3,5.(-31,7+21,7)]+[0,6.(45,9+54,1)]$

    $=[3,5.(-10)]+[0,6.100]$

    $=-35+60=25$

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