Frações - 6ºAno

Efetue as operações simplificando a fração resultado, o máximo possível:

1) (2/3).(3/4) = Resp. ½                           2) (3/5).(2/7).(4/3) = Resp. 8/35

3) (3/8).(5/7).(7/3) = Resp. 5/8               4) (12/15).(3/8).(5/9) = Resp. 1/6 

5) 7.(5/9).(3/10) = Resp. 7/6                   6) 5.(3/7) = Resp. 15/7

7) (3/5).10 = Resp. 6                               8) (2/9).(3/8) = Resp. 1/12 

9) (3/5).(4/7).(35/48) = Resp. ¼             10) 2.(2/7) + (3/4).(4/7) = Resp. 1 

11) (2/5).3.(1/2) + (4/5).(3/8) = Resp. 9/10          12) 4.(3/7).(14/9) – 3.(1/5).(10/21) = Resp. 50/21

13) (3/4).2.(5/6) – 3.(1/6) = Resp. ¾                  14) 5.(1/15).(6/7) + (1/2).(1/3) = Resp, 19/42

15) (3/5).(5/6).3 – 6.(2/9).(1/2) = Resp. 5/6

EXERCÍCIOS :

Efetue as operações indicadas:

1) 5.(3/7) = Resp. 15/7 

 2) (3/5).10 = Resp. 30/5 ou 6 

 3) (2/9).(3/8) = Resp. 6/72 ou 1/12 

 4) (3/5).(4/7).(35/48) = Resp. ¼ 

 5) 2.(2/7) + (3/4).(4/7) = Resp. 1 

 6) (2/5).3.(1/2) + (4/5).(3/8) = Resp. 9/10

 Efetue as seguintes operações e simplifique a fração resposta o máximo possível:

1) 5 : (3/4) = Resp. 20/3 

 2) (5/6) : 5 = Resp. 1/6

 3) (3/5) : (4/15) = Resp. 9/4

4) (10/9) : (20/21) = Resp. 7/6

5)  (3/5 + 2/3):( 2/5): (4/5) = Resp. 95/24

6) {[2/3 + (2/5):(6/10) : (1/3 + 2/5):(11/20) : 2.(1/3) + (4/7).(3/5) = Resp.315/424