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calculs astucieusement :

A= 44/11+32/10+63/7

B= 1,3/1,2-11/12

C= 3/4+5/7+2/3+1/4+2/7+1/3

D= 7/10 + 1/4+39/13- 75/25

SVP

Bonne journée ​


Répondre :

A = 44/11 + 32/10 + 63/7

= 4×11/1×11 + 3,2 + 9×7/1×7

=4/1 + 3,2 + 9/1

= 4+3,2+9

= 16,2

B = 1,3/1,2-11/12

= 13/12-11/12

= 2/12

= 1/6

C = 3/4+5/7+2/3+1/4+2/7+1/3

= 3/4+1/4+5/7+2/7+2/3+1/3

= 4/4+7/7+3/3

= 1+1+1

= 3

D = 7/10+1/4+39/13-75/25

= 7/10+1/4+3×13/1×13-3×5×5/1×5×5

= 7/10+1/4+3-3

= 14/20+5/20

= 19/20

= 9,5/10

=0,95