Website Statistics 25 Calculer les expressions suivantes sachant que 73ab5101 R abc2SabbcC43Taba svppp

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hirondelle52

Bonjour;

1)

7/5 *-3/10 -4

= -21/50 -4

= -21/50 -4/50/50

= -21/50 -200/50

= -221/50

2)

7/5 *-3/10 - (-3/10*-4)

= -21/50 - 12/10

= -21/50 - 12/10*5/5

= -21/50 -60/50

= -81/50

3)

( 7/5 -3/10) ( 7/5 -4)

= (7/5 *2/2 -3/10) ( 7/5 -4*5/5)

=(14/10-3/10) ( 7/5 -20/5)

= 11/10 * (-13/5)

= -143/50

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