Question

78,4:(15,7-7,86)×4,12

=

=

(131,4-80,8):2,3-21,84

=

=

6/7:(1/2×3/4)-5/8

=

=

8,16:(1,32+3,48)-0,345

 

Answer 1

78,4 : ( 15,7 - 7,86 ) . 4,12

= 78,4 : 7,84 . 4,12

= 10 . 4,12

= 41,2

( 131,4 - 80,8 ) : 2,3 - 21,84

= 50,6 : 2,3 - 21,84

= 22 - 21,84

= 0,16

[ P/S : Tính sai =>bỏ ]

Answer 2

78,4:(15,7-7,86)x4,12

=78,4:7,84x4,12

=10x4,12

=41,2

(131,4-80,8):2,3-21,84

=50,6:2,3-21,84

=22-21,84

=0,16

8,16:(1,32+3,48)-0,345

=8,16:4,8-0,345

=1,7-0,345

=1,355

Answer 3

6/7 : ( 1/2 . 3/4) - 5/8

= 6/7 : 3/8 - 5/8

= 16/7 - 5/8

=93/56

8,16 : ( 1,32 + 3,48) - 0,345

= 8,16 : 4,8 - 0,345

= 1,7 - 0,345

= 1,355

[ P/S : /Giống trên/