Question

A) 2 3/5 * 6 1/4 - 3 1/4 : 3 5/7 + 0,625
b) 4 4/5 : 1,6 : 1 7/8 - 1 5/8 + 2,25
c) 28 3/5 - 0,6 * (8 2/3 - 3 1/4 + 2 1/2 - 5/12)

Obliczcie mi to proszę :)
legenda:
* - razy
np. 2 3/5 = dwa i trzy piąte

Answer 1

A) 
2i3/5 *6i1/4 -3i1/4 :3i5/7 +0,625 =
13/5 * 25/4 - 13/4 : 26/7 + 0,625 =
13/1 * 5/4 - 13/4 * 7/26 + 0,625 =
65/4 - 1/4 * 7/2 + 0,625 =
65/4 - 7/8 + 5/8 =                       (0,625 = 625/1000 = 5/8)
16i1/4 - 7/8 + 5/8=
16i2/8 - 7/8 + 5/8 = 16i7/8 - 7/8 = 16

b)
4i4/5 : 1,6 : 1i7/8 - 1i5/8 + 2,25 =
4,8 : 1,6 : 1,875 - 1,625 + 2,25 =      ( 4/5 = 0,8) i (7/8 = 0,875) i (5/8 = 0,625)
3 : 1,875 -1,625 +2,25 =
1,6 - 1,625 + 2,25 =
- 0,025 + 2,25 = 2,225

c)
28i3/5 - 0,6 *( 8i2/3 - 3i1/4 +2i1/2 - 5/12) =
28i3/5 - 0,6 *(8i8/12 -3i3/12 +2i6/12 -5/12) =
28i3/5 - 0,6 *(10i14/12 - 3i8/12) =
28 i 3/5 - 0,6 * 7 i 6/12 =                         (6/12 = 0,5)
28 i3/5 - 0,6 * 7,5 =
28 i 3/5 - 4,5 =                                       (3/5 = 0,6)
28,6 - 4,5 = 24,1

Answer 2

a) 2 3/5 * 6 1/4 - 3 1/4 : 3 5/7 + 0,625=13/5*25/4 - 13/4 : 26/7 + 625/1000= 65/4-13/4*7/26+5/8=65/4 -7/8+5/8=130/8-7/8+5/8=128/8=16
b) 4 4/5 : 1,6 : 1 7/8 - 1 5/8 + 2,25= 24/5:16/10:15/8+2 25/100=24/5*10/16:15/8+2 1/4=
8/1*8/15+2 1/4=64/15 + 2 1/4= 4 4/15 + 2 1/4= 4 16/60+ 2 15/60 =6 31/60
c) 28 3/5 - 0,6 * (8 2/3 - 3 1/4 + 2 1/2 - 5/12)=28 3/5 - 6/10* ( 8 8/12 - 3 3/12+ 2 6/12 - 5/12)= =28 3/5 - 6/10*( 5 5/12 + 2 6/12 - 5/12) = 28 3/5 - 6/10* ( 7 11/12 - 5/12)=
28 3/5 - 6/10* 2 6/10 = 28 3/5 - 6/10 * 26/10 = 28 15/25 - 39/25 = 28 15/25 - 1 14/25=
27 1/25


MAM NADZIEJE ŻE DOBRZE:P