Question

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2,5:1.1/3+3.3/4*4,2=

2,6+3.2/5:1,7+4/7*2.1/3=

4,5:(2.2/5-2,25)+1.5/6=

2/3-(4/5-0,8*3/8):3/4=

3,5+11/9*1,8=

(7/9+0,75)*(2.9/11-1,5)=

(1,2:3/5-11/3*0,3):1.1/7=

Answer 1

2,5:1 i 1/3+3 i 3/4*4,2=

 

= 2 i 5/10 : 4/3 + 15/4 * 4 i 2/10=

 

= 2 i 1/2 * 3/4 + 15/4 * 42/10=  (skracam 15 z 10 oraz 4 z 42)

 

= 5/2 * 3/4 + 3/2 * 21/2 =

 

= 15/8 + 63/4=

 

= 1 i 7/8 + 15 i 3/4=

 

= 1 i 7/8 + 15 i 6/8 =

 

= 16 i 13/8=

 

= 17 i 5/8

 

 

 

 

 

 

2,6+3 i 2/5:1,7+4/7*2 i 1/3=

 

= 2 i 6/10 + 17/5 : 1 i 7/10 + 4/7 * 7/3=  (skracam 7 z 7)

 

= 2 i 6/10 + 17/5 : 17/10 + 4/1 * 1/3=

 

= 2 i 6/10 + 17/5 * 10/17 + 4/3=

 

= 2 i 6/10 + 1/1 * 2/1 + 1 i 1/3=

 

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

 

= 2 i 9/15 + 2 + 1 i 5/15=

 

= 5 i 14/15

 

 

 

 

 

 

4,5:(2 i 2/5-2,25)+1 i 5/6=

 

= 4 i 5/10 :(2 i 2/5 - 2 i 25/100) + 1 i 5/6=

 

= 4 i 1/2 : ( 2 i 2/5 - 2 i 1/4) + 1 i 5/6=

 

= 9/2 : ( 2 i 8/20 - 2 i 5/20) + 1 i 5/6=

 

= 9/2 : 3/20 + 1 i 5/6=

 

= 9/2 * 20/3 + 1 i 5/6=

 

= 3/1 * 10/1 + 1 i 5/6=

 

= 30/1 + 1 i 5/6=

 

= 30 + 1 i 5/6=

 

= 31 i 5/6

 

 

 

 

 

2/3-(4/5-0,8*3/8):3/4=

 

= 2/3 - ( 4/5 - 8/10 * 3/8) * 4/3=

 

= 2/3 - (4/5 - 1/10 * 3/1) * 4/3=

 

= 2/3 -(4/5 - 3/10) * 4/3=

 

= 2/3 - (8/10 - 3/10) * 4/3=

 

= 2/3 - 5/10 * 4/3 =

 

= 2/3 - 1/2 * 4/3=

 

= 2/3 - 1/1 * 2/3=

 

= 2./3 - 2/3=

 

= 0

 

 

 

 

 

3,5+11/9*1,8=

 

= 3 i 5/10 + 11/9 * 1 i 8/10=

 

= 3 i 5/10 + 11/9 * 18/10=

 

= 3 i 5/10 + 11/1 * 2/10 =

 

= 3 i 5/10 - 22/10=

 

= 3 i 5/10 - 2 i 2/10=

 

= 1 i 3/10

 

 

 

 

 

 

 

(7/9+0,75)*(2 i 9/11-1,5)=

 

= ( 7/9 + 75/100) * (2 i 9/11 - 1 i 5/10)=

 

= (7/9 + 3/4) * ( 2 i 9/11 - 1 i 1/2)=

 

= (28/36 + 27/36) * ( 2 i 18/22 - 1 i 11/22)=

 

= 55/36 * 1 i 7/22=

 

= 55/36 * 29/22=

 

= 5/36 * 29/2=

 

= 145/72=

 

= 1 i 1/72

 

 

 

 

 

(1,2:3/5-11/3*0,3):1 i 1/7=

 

= ( 1 i 2/10 * 5/3 - 11/3 * 3/10) : 8/7=

 

= (12/10 * 5/3 - 11/1 * 1/10) * 7/8=

 

= (4/2 * 1/1 - 11/10) * 7/8=

 

= (4/2 - 11/10) * 7/8=

 

= (2 - 11/10) * 7/8=

 

= 9/10 * 7/8=

 

= 63/80