Question

5. Oblicz sprytnie:
a)2 2/3 + 2 3/5 + 1/3 c)2 5/7 + 7 2/5 + 2 2/7 + 3 3/5
b)7/9 + 1 3/4 + 1/4 d) 2 3/4 + 1 1/6 + 4 5/6 + 1 2/4

Answer 1

Odpowiedź:

a)

2 i 2/3 + 2 i 3/5 + 1/3 =

= 2 i 2/3 + 1/3 + 2 i 3/5=

= 3 + 2 i 3/5=

= 5 i 3/5

b)

7/9 + 1 i 3/4 + 1/4 =

= 7/9 + 2 =

= 2 i 7/9

c)

2i 5/7 + 7 i 2/5 + 2i 2/7 + 3 i 3/5=

= 2 i 5/7 + 2 i 2/7 + 7 i 2/5 + 3 i 3/5=

= 5 + 11 =

= 16

d)

2 i 3/4 + 1 i 1/6 + 4 i 5/6 + 1 i 2/4=

= 2 i 3/4 + 1 i 2/4 + 1 i 1/6 + 4 i 5/6=

= 4 i 1/4 + 6=

= 10 i 1/4

Szczegółowe wyjaśnienie: