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2nESO12-13- Bloc 1.pdf - Institut Alexandre Satorras

2nESO12-13- Bloc 1.pdf - Institut Alexandre Satorras

2nESO12-13- Bloc 1.pdf - Institut Alexandre Satorras

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1<br />

6 4<br />

1<br />

⋅ = 8⋅ =<br />

12<br />

7 9<br />

⋅ =<br />

3 2<br />

5 4<br />

⋅ =<br />

3 3<br />

2<br />

7<br />

14<br />

5<br />

1 2<br />

⋅ ⋅ =<br />

4 3<br />

7 4<br />

⋅ ⋅ =<br />

2 3<br />

100<br />

7<br />

700<br />

⋅ =<br />

5<br />

11<br />

30 60 ⋅ =<br />

3<br />

5<br />

8 5<br />

⋅ ⋅ =<br />

3 8<br />

1 12 1 8<br />

⋅ ⋅ ⋅ =<br />

2 5 6 3<br />

5 7 17<br />

8 10<br />

⋅ ⋅ = ⋅ 4 ⋅ =<br />

3 4<br />

5 16<br />

25. Escriu la fracció recíproca de cada una d'aquestes:<br />

4 33 1<br />

: :<br />

:<br />

26 :<br />

9<br />

100<br />

14<br />

Multiplica cada fracció anterior per la seva recíproca i simplifica el resultat.<br />

Observa el que has fet i completa:<br />

Si es multipliquen dues fraccions recíproques........................................................<br />

DIVISIÓ DE FRACCIONS<br />

Recordes:<br />

Fes aquestes operacions?<br />

3 1<br />

+ =<br />

10 5<br />

3 1<br />

⋅ =<br />

10 5<br />

3 1<br />

− =<br />

10 5<br />

3<br />

5 10 + =<br />

26. Fes de la mateixa manera aquestes divisions i simplifica els resultats:

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