Misha23m26id
a fost răspuns

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
4.( 11 supra 15 : 22 supra 25 + 5 supra 3 + 1 supra 2 ) : ( 14 supra 3 : 21 supra 4 + 11 supra 12 - 2 supra 9 )

Răspuns :

Răspuns:

Explicație pas cu pas:

2. 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

=30/7*(10/12 - 5/12) - 5/14

=30/7*5/12 - 5/14 = 25/14 - 5/14 = 20/14 = 10/7

3. ( 19/8 - 2/3 : 4/9 ) - ( 2 - 5/4 ) : 15/16

= (19/8 - 2/3*9/4) - (8/4 - 5/4) *16/15

=(19/8 - 3/2) - 3/4*16/15

= (19/8 - 12/8) - 4/5 = 7/8 - 4/5 = 35/40 - 32/40 = 3/40

4.( 11/15 : 22/25 + 5/3 + 1/2 ) : ( 14/3 : 21/4 + 11/12 - 2/9 )

= (11/15 *25/22 + 5/3 + 1/2) : (14/3*4/21 + 11/12 - 2/9)

= (5/6 + 10/6 + 3/6) : (8/9 + 11/12 - 2/9)

=18/6 : (6/9 + 11/12)

= 3 : (2/3 + 11/12)

= 3 : (8/12 + 11/12)

= 3 : 19/12 = 3*12/19 = 36/19

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