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AM NEVOIE URGENT !!!!!
2) 30 supra 7 ori ( 5 supra 6 - 1 supra 4 : 3 supra 5 ) - 5 supra 14
3) ( 19 supra 8 - 2 supra 3 : 4 supra 9 ) - ( 2 - 5 supra 4 ) : 15 supra 16


Răspuns :

Răspuns:

30/7×(5/6-1/4÷3/5)-5/14

30/7×(5/6-1/4×5/3)-5/14

30/7×(5/6-5/12)-5/14 amplifici pe 5/6 cu 2

30/7×(10/12-5/12)- 5/14

30/7×5/12-5/14 simplifici 30 si 12 cu 3

50/28-5/14 amplifici pe 5/14 Cu 2

50/28-10/28

40/28=20/14=10/7

3)(19/8-2/3÷4/9)-(2-5/4)÷15/16

(19/8-2/3×8/4)-(4/4-5/4)÷15/16

(19/8-3/2)-(-1/4)÷15/16

(19/8-12/8)-(-1/4)÷15/16

7/8+1/4÷15/16

7/8+1/4×16/15

7/8+4/15 amplifici 7/8cu15 si 4/5 Cu 8

105/120+32/120

137/120