Aidez moi svp merci c’est pour demain

Réponse:

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Explications étape par étape:

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Bonjour,

A)

-4/15  +7/2

= -8/30 + 105/30

= 97/30

b)

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

= -28/ 15 -7/10

= -56/30 - 21/30

= -77/30

c)

13/7 + 8/7 * 5/4

=13/7  + 40/ 28

= 52/28 +40/28

= 92/28 = 46/14 = 23/7

d)

7/3 + (- 30/ 42)

= 7/3+ (-10/21)

= 49/21 - 10/21

= 39/21

e)

5/8 +3/4*16/9

= 5/8 + 48/36

= 5/8 + 4/3

= 15/24 + 32/24

= 47/24

f)

6/5 -( 1/9*3/4)

= 6/5 - 3/36

= 6/5 - 1/12

= 6/5 * 12/12 -1/12 * 5/5

= 72/60  - 5/60

= 67/60