12) (-85)×5+95×(-85). 13)272-2×{140+[(-8)^2-9×2^0]÷5

2 bình luận về “12) (-85)×5+95×(-85). 13)272-2×{140+[(-8)^2-9×2^0]÷5”

1. \bb 12)

   (-85)xx5+95xx(-85)

   =(-85)xx(5+95)

   =(-85)xx100

   =-8500

   $\\$

   \bb 13)

   272-2xx{140+[(-8)^2-9xx2^0]:5}

   =272-2xx{140+[64-9xx1]:5}

   =272-2xx{140+55:5}

   =272-2xx{140+11}

   =272-2xx151

   =272-302

   =-30

   Trả lời
2. 12 )

   (-85) xx 5 + 95 xx (-85)

   = (-85) xx ( 5 + 95 )

   = (-85) xx 100

   = (-8500)

   13 )

   272-2 xx {140+[(-8)^2-9 xx 2^0]÷5}

   = 272 – 2 xx { 140 + [ 64 – 9 xx 1 ] :5}

   = 272 – 2 xx { 140 + [ 64 – 9 ] : 5}

   = 272 – 2 xx { 140 + 55 : 5 }

   = 272 – 2 xx { 140 + 11 }

   = 272 – 2 xx 151

   = 272 – 302

   = (-30)

   $\text{@TuyetNhye}$

    

   Trả lời