👤
Answered

Bonsoir a tous

 

 

Combien fait :

 

A=12:5-3:5x7:4                         B=(3:4+1:3):(7:5-1:2)        C=6x10^-7x15x10^11

                                                                                                        _____________

                                                                                                       

                                                                                                              8x(10^2)^4

 

Précisez tous les calculs et  ^ =exposant

Sagot :

A = 12 : 5 - 3 : 5 x 7 : 4
= 2,4 - 0,6 x 1,75
= 2,4 - 1,05
= 1,35

B = ( 3 : 4 + 1 : 3 ) : ( 7 : 5 - 1 : 2 )
= ( 0,75 + 1 / 3 ) : ( 1,4 - 0,5 )
= 13 / 12 : 0,9
= 65/54

 C = 6 x 10^-7 x 15 x 10^11 / 8 x ( 10^2 )^4
= 3 / 5 000 000 x 1,5 x 10^12 / 8 x 100 000 000
= 900 000 / 800 000 000
= 9 / 8 000 ou 1,125 x 10^-3

Other Questions

© 2024 IDNLearn. All rights reserved.