1. Tính ( tính hợp lý nếu có thể) a. 17/11 – (6/5 – 16/11)+ 5,2; b. (1+ 1/2 – 1/4)² × ( 2 +3/7); c. 3¹¹+3¹/1+3³; d. [( 1/81

2 bình luận về “1. Tính ( tính hợp lý nếu có thể) a. 17/11 – (6/5 – 16/11)+ 5,2; b. (1+ 1/2 – 1/4)² × ( 2 +3/7); c. 3¹¹+3¹/1+3³; d. [( 1/81”

1. Giải đáp + Lời giải và giải thích chi tiết:

   a)

   17/11 – ( 6/5 – 16/11 ) + 5,2

   = 17/11 – 6/5 + 16/11 + 52/10

   = ( 17/11 + 16/11 ) + ( 52/10 – 6/5 )

   = 33/11 + ( 26/5 – 6/5 )

   = 3 + 20/5 = 3 + 4 = 7

   b)

   ( 1 + 1/2 – 1/4 )^2 xx ( 2 + 3/7 )

   = ( 4/4 + 2/4 – 1/4 )^2 xx ( 14/7 + 3/7 )

   = ( 5/4 )^2 xx 17/7

   = 25/16 xx 17/7

   = 425/112

   c)

   3^11 + ( 3^1 )/1 + 3^3

   = 3^11 + 3^1 + 3^3

   = 177147 + 3 + 27

   = 177147 + 30

   = 177177

   d)

   [ ( 1/81 – 3/162 ) xx 81/17 + 35/34 ] : [ ( 9/51 + 7/102 ) ] xx 102/5 + 2017

   = [ ( 2/162 – 3/162 ) xx 81/17 + 35/34 ] : [ ( 18/102 + 7/102 ) ] xx 102/5 + 2017

   = ( – 1/162 xx 81/17 + 35/34 ) : 25/102 xx 102/5 + 2017

   = ( – 1/34 + 35/34 ) xx 102/25 xx 102/5 + 2017

   = 34/34 xx 10404/125 + 2017

   = 1 xx 10404/125 + 2017

   = 10404/125 + 2017

   = 10404/125 + 252125/125

   = 262529/125

   #tn

   Trả lời
2. a, 17/11 – ( 6/5 – 16/11 ) + 5,2

   = 17/11 – 1,2 + 16/11 + 5,2

   = ( 17/11 + 16/11 ) + ( 5,2 – 1,2 )

   = 3 + 4

   = 7

   b, ( 1 + 1/2 – 1/4 )^2 . ( 2 + 3/7 )

   = ( 4/4 + 2/4 – 1/4 )^2 . ( 14/7 + 3/7 )

   = ( 5/4 )^2 . 17/7

   = 25/16 . 17/7

   = 425/112

   c, ( 3^(11) + 3 )/( 1 + 3^3 )

   = ( 177147 + 3 )/( 1 + 27 )

   = 177150/28

   = 88575/14

   d, [ ( 1/81 – 3/162 ) . 81/17 + 35/34 ] : [ ( 9/51 + 7/102 ) . 102/5 + 2017 ]

   = [ ( 2/162 – 3/162 ] . 81/17 + 35/34 ] : ( 18/102 + 7/102 ) . 102/5 + 2017 ]

   = [ (-1)/162 . 81/17 + 35/34 ] : [ 25/102 . 102/5 + 2017 ]

   = [ (-1)/34 + 35/34 ] : [ 5 + 2017 ]

   = 1 : 2022

   = 1/2022

   Trả lời