👤

Calculați :
[tex]a)( - \frac{2}{5} ) \times 2.5[/tex]
[tex]b)3 \frac{1}{4} \times ( - 1 \frac{3}{13} )[/tex]


Răspuns :

a ) (-2/5)·2,5 =

= (-2/5)·25/10

= -5/5

= -1

b ) 3 1/4·(-1 3/13) =

= 13/4·(-16/13)

= -4