a.1234-[1234-(4 mũ 2 -2 x3) mũ 3 x4] b.(39-19):(-2)+(34-22) x 5 c.25 x (-2) mũ 2+5 x (2+3) d.5 x (2 mũ 3+1) : 9 e.5 x (2 mũ 3

2 bình luận về “a.1234-[1234-(4 mũ 2 -2 x3) mũ 3 x4] b.(39-19):(-2)+(34-22) x 5 c.25 x (-2) mũ 2+5 x (2+3) d.5 x (2 mũ 3+1) : 9 e.5 x (2 mũ 3”

1. a) 1234 – [1234 – (4^2 – 2 . 3)^3 . 4]

   = 1234 – [1234 – (16 – 6)^3 . 4]

   = 1234 – [1234 – 10^3 . 4]

   = 1234 – [1234 – 1000 . 4]

   = 1234 – [1234 – 4000]

   = 1234 – 1234 + 4000

   = 0 + 4000

   = 4000

   —————————————

   b) (39 – 19) : (-2) + (34 – 22) . 5

   = 20 : (-2) + 12 . 5

   = -10 + 60

   = 50

   ———————————-

   c) 25 . (-2)^2 + 5 . (2 +3)

   = 25 . 4 + 5 . 5

   = 100 + 25

   = 125

   ————————————-

   d) 5 . (2^3 + 1) : 9

   = 5 . (8 + 1) : 9

   = 5 . 9 : 9

   = 45 : 9

   = 5

   ———————————–

   e) 5 . (2^3 + 1) . 9

   = 5 . (8 + 1) . 9

   = 5 . 9 . 9

   = 45 . 9

   = 405

   —————————

   @Christian

    

   Trả lời
2. a, 1234-[1234-(4^2-2xx3)^3xx4]

   = 1234-[1234-(16-6)^3xx4]

   = 1234-[1234-10^3xx4]

   = 1234-[1234-1000xx4]

   = 1234-1234+4000

   = 4000

   b, (39-19):(-2)+(34-22)xx5

   = 20:(-2)+12xx5

   = -10+60

   = 50

   c, 25xx(-2)^2+5xx(2+3)

   = 25xx4+5xx5

   = 100+25

   = 125

   d, 5xx(2^3+1):9

   = 5xx(8+1):9

   = 5xx9:9

   = 5xx1

   = 5

   e, 5xx(2^3+1)xx9

   = 5xx(8+1)xx9

   = 5xx9xx9

   = 405

    

   Trả lời