Răspuns:
Explicație pas cu pas:
9)
( 6 / 11 ) × ( 22 / 30 ) = ( 6 / 30 ) × ( 22 / 11 ) = ( 1 / 5 ) × 2 = 2 / 5
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1)
( 3 / 4 ) : ( 3 / 4 - 1 / 2 ) - 4 /9= 23 / 9
= ( 3 / 4 ) : ( 3 / 4 - 2 /4) - 4 / 9 =
= ( 3 /4 ) : ( 1 / 4 ) - 4 / 9=
= ( 3 / 4 ) × ( 4 / 1 ) - 4 / 9 =
= 3 - 4 / 9 =
= 27 / 9 - 4 / 9 =
= 23 / 9 =
= 2 intregi si 5/9 =
= 2,(5)