Module 1 - Langage mathématique de base Travail noté 1

RÉPONSES:

QUESTION 1

a) 5+10-3 x 2  6

= 5+10 - ( 3 x 2)  6 
= 5+10- (6  6)
= 5+10-1
=15-1
=14

b) - 25- 5 x 3 + 8  2

= -25 - (5 x 3) +(8  2)
= -25 - (15) + (8  2)
= -25 - 15 + 4
= - 40 + 4
= -36

c) (3+7) x 2 + (15+3) x 4

= 10 x 2 +18 x 4
= 20 + 72
= 92

d) 68 + 32  (-8)

= 68 + ( - 4)
= 64

e) 48+ ( -11 + 3) x 2 + ( 4+24) 7 

= 48+ (-8) x 2 +( 28)  7 ) 

= 48 + ( -16 + 4 )

= 48 + ( -12)

= 36 P 1

QUESTION 2

a) 114 000 + 26 000 = 140 000 40 000 40 000 40 000 26 000+ 1-48% 26 000 +  (1-0,48) = 26 000 +  0.52 

40 000  0,52 = 76923, 076

26 000 + 76923,076 = 102923, 08 140 000 = 140 000  102923,08  1,3602391 102923,08

b) -45 - ( -5) + 5 x 21 =  - 45 - ( -5)  + ( 5x 21) = - 40 + 105 = 65 = 65  - 13  -5 - 6 + 49  (-7) -6 + ( 49  (-7) -6 + ( -7) -13

c) 150 000 = 150 000 1 - 3 1- ( 3 = 3  4 = 0,75 ) = 150 000 = 150 000  0,25  600 000 4 4 0,25

d) 80 000 ( 2 - 1,60) = 80 000 ( 0. 4) = 80 000 x 0,4 = 32 000 80 000 ( 2 - 1, 60) - 12 000 80 000 ( 0,4) - 12 000 80 000 x 0,4 32 000 - 12 000