Răspuns:
Explicație pas cu pas:
c) ( 1 / 7 : 3 / 5 ) / ( 3/ 7 × 5 / 6 ) =
= ( 1 / 7 × 5 / 3 ) : ( 5 / 14 ) =
= 5 / 21 × 14 / 5 = → simplific pe 5 cu 5; pe 14 cu 21 prin 7
= 2 / 3
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d) ( 72 / 24 ) : ( 32 / 12 ) =
= 3 × 12 / 32 =
= 36 / 32 =
= ( 36 : 4 ) / ( 32 : 4 ) =
= 9 / 8
= 1 intreg si 1 / 8
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e) ( 35 / 108 ) : ( 385 / 324 ) = 3 / 11
= ( 35 / 108 ) × ( 324 / 385 ) =
=> ( 35 / 385 ) × ( 324 / 108 ) =
= ( 1 / 11 ) × 3 =
= 3/11
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f) → introduc intregii in fractie
2 intregi si 19 / 49 = ( 2 × 49 + 19 ) / 49 = 117 / 49
5 intregi si 4 / 7 = ( 5 x 7 + 4 ) / 7 = 39 / 7
( 117 / 49 ) : ( 39 / 7 ) = 3 / 7
= ( 117 / 49 ) × ( 7 / 39 ) =
= ( 117 : 39 ) / ( 39 : 39 ) × ( 7 / 49 ) =
= 3 × 1 / 7 =
= 3 / 7
