Question

Oblicz:

a) 2/5 +0,77

b)1,75-5/6

c)6,4*5/8

d)2/15*0,75

Answer 1

a) 2/5+0,77=0,4+0,77=1,17

b) 1,75-5/6=1i3/4-5/6=1i9/12-10/12=21/12-10/12=11/12

c) 6,4*5/8=6,4*0,625=4

d) 2/15*0,75=2/15*3/4=1/10

Answer 2

a) 2/5 +0,77

Odp- 2/5 = 0,4 + 0,77 =1,17

 

b)1,75-5/6

Odp- 1,75 = 1 3/4

1 3/4 - 5/6 = 7/4 - 5/6 = 42/24 - 20/42= 22/42 = 11/21

 

c)6,4*5/8

Odp- 6 2/5 = 32/5 * 5/8 = 160/40=4

 

d)2/15*0,75

Odp-2/15 * 3/4 = 8/60 * 45/60 = 360/60=6

 

Pozdrawiam.