Question

2) ( 2/3 - 0,5 ) * 3 =
5) 1/6 - 0,01 : 02 =
6) (0,6 - 5/12) : 0 ,5 =
8) 1/7+0,05*0,8 =
9) 1 2/13 * 8,2 - 1,11 =
11) 16* 3/11 + 15,28 :2 =
12) 2,49 : 5/6 + 1 3/4+
13) (2 7/24 - 1,25) * 5,5 - 2,48 =
15) 6/7 : 0,2 + 3,9 * 0,2=
16) (8/9 - 0,86) * (3 1/2 + 3,5)=
18) 11 11/23 : 0,8 + 22,05 =

Tam gdzie jest np 1/6 to to jest jedna szosta a jak jest 1 2/13 to to jest jedna cala i 2 trzynaste :D

Answer 1

2) = (2/3 - 1/5) * 3 = (10/15 - 3/15) * 2= 7/15 * 3 = 7/5 =  1 2/5
5) = (1/6 - 1/100) :0,2 = (50/300 - 3/300) : 0,2 = 47/300 :0,2 = 47/300 * 10/2 = 47/60
6) = (3/5 - 5-12) :0,5 = (36/60 - 25/60) : 0,5 = 11/60 : 1/2 = 11/60 * 2/1= 11/30
8) = 1/7 + 0,04 = 1/7 + 1/25 = 25/175 + 7/175 = 32/175
9) = ( 1 2/13 * 8 1/5) - 1,11= 123/13 - 1,11= 9 6/13 - 1 11/100= 9 600/1300 - 1 143/1300 = 7 475/1300 = 7 95/260 = 7 19/52
11) = 48/11 + 7,64 = 48/11 + 7 64/100 = 4800/1100 + 7 704/1100= 4 400/1100 + 7 704/1100 = 11 1104/1100 = 12 4/1100= 12 1/275
12) = 2 49/100 : 5/6 + 1 3/4= 747/2500 + 1 3/4= 747/2500 + 1 1875/2500 = 1 1322/2500
 

Answer 2

2) (2/3 -0,5) * 3 = (2/3 - 5/10) * 3 = (20/30 -15/30)*3 = 5/30* 3 = 15/30= 1/2

 

5) 1/6 - 0,01 :0,2 = 1/6 - 0,05 = 1/6 -5/100 = 50/300-15/300=35/300 = 7/60

 

6) ( 0,6 - 5/12 ): 0,5 = ( 6/10 -5/12) : 0,5 = ( 36/60 -25/60):0,5=

11/60:5/10=  11/60 * 10/5 = 11/6 * 1/5 = 11/30

                  

 

8) 1/7 + 0,05 * 0,8 = 1/7 +0,04 = 1/7 + 4/100 = 100/700+ 28/700 = 128/700=

     = 32/175

 

9) 1i2/13 * 8,2 - 1,11 = 15/13*82/10 -1,11 =3/13 * 82/2 - 1 i 11/100 =

=246/26 -1 i11/100= 9 i 12/26 - 1 i11/100 = 9 i 600/1300 - 1 i143/1300=

= 8 i 457/1300

 

 

     

 

11) 16 * 3/11+ 15,28:2 = 48/11 + 7,64= 4 i 4/11 + 7i64/100 = 4 i 400/1100+

     + 7 i 704/1100 = 11 i 1104/1100= 12 i 4/1100 = 12 i 1/275

 

12) 2,49:5/6+1i3/4= 249/100 * 6/5 + 1i3/4= 249/50 * 3/5 + 1i3/4= 

      = 747/250 +1i3/4= 2i247/250+1i3/4= 2i494/500 + 1i 375/500 =

      = 3 i 869/500 = 4 i 369/500

 

13) (2i7/24-1,25)*5,5-2,48 = 2i7/24-1i25/100)*5,5-2,48=2i175/600-          1i150/600) *5,5-2,48= 1i25/600 *5,5-2,48=625/600*55/10-2,48 = =125/120*11/2-2,48= 1375/240-248/100 = 5i175/240-2i48/100=

=5 i 875/1200-2i576/1200= 3 i 299/1200

 

15) 6/7:0,2 +3,9*0,2= 6/7 :2/10 + 39/10* 2/10= 6/7 *10/2  +39/5 *1/10 = 

      = 3/7*10/1 + 39/50 = 30/7+39/50= 4i2/7+39/50= 4i100/350 +273/350=

      = 4 i 373/350 = 5 i 23/350

 

16) (8/9-0,86)*(3i1/2 +3,5) = (8/9-86/100)*(3i1/2+3i1/2)=(800/900-

       - 774/900) * 7 = 26/900 * 7 = 18/2/900 = 91/450

 

18) 11i11/23:0,8 + 22,05 = 11,48:0,8 + 22,05 = 14,35 + 22,05 = 36,40