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Anastasia1111566
a fost răspuns

Calculati : ( 4 supra 9 : 2 supra 3 + 4 2 supra 3 ) ori 9 supra 40

Răspuns :

EagleEyes
( 4/9 : 2/3 + 4 2/3 ) × 9/40 =

= ( 4/9 × 3/2 + 14/3 ) × 9/40 =

= ( 2/3 + 14/3 ) × 9/40 =

= 16/3 × 9/40 =

= 2 × 3/5 = 6/5
(4/9 : 2/3 + 4 2/3) · 9/40 =

= (4/9 · 3/2 + 14/3) · 9/40 

= (2/3 + 14/3) · 9/40 

= 16/3 · 9/40 

= 2 · 3/5

= 6/5

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