Expressões numéricas , as 4 operações, m.d.c. e m.m.c.

1 - Calcule as expressões:

a) 60 – {48 – [16 : (4 + 4) ] } =       

b) 4 x { 19 + [5 + (32 : 4 – 6 ) ] } =       

c) 500 – { 6 x [ 25 : 5 + ( 4 x 8 – 25 ) ] } =

2 - Efetue:

a) 347559	BB	b) 38608
29456		–  20749
+   7354

c) 6425	BB	d) 58236 |_23____
x   324

3 - Calcule o m.d.c.

a) 90 e 54=                                    

b) 20 e 24=                                    

c) 48 e 36=

4- Calcule o m.m.c.

a) 16,9=                                     

b) 25,4=                                      

c) 18,12=