Question

Calculați :
$a)( - \frac{2}{5} ) \times 2.5$
$b)3 \frac{1}{4} \times ( - 1 \frac{3}{13} )$
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Answer 1

a ) (-2/5)·2,5 =

= (-2/5)·25/10

= -5/5

= -1

b ) 3 1/4·(-1 3/13) =

= 13/4·(-16/13)

= -4