Question

1. oblicz:

a). 3 3/4

_______________________________

( 3 1/2 + 2 1/3) : 1 3/4

b). 1 3/4 : 7/8 - 3/8 * 1 3/5

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1/5 :5

c). ( 3 2/5 - 2 3/4) : 2 1/12

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1 1/2 * 1 7/9 - 2/3

Answer 1

a)      3 3/4                            15/4                       15/4             15/4

_________________  =__________________= ____________=________ = 

(3 1/2+2 1/3):1 1/3     (3 3/6+2 2/6):1 3/4      5 5/6:1 1/3    35/6:7/4

 

        15/4           15/4

=_________= __________= 15/4:70/21= 14/4*21/70=63/56=1 7/56

  35/6*4/7        70/21

 

 

b)   1 3/4:7/8-3/8*1 3/5        7/4:7/8-3/8*8/5    7/4*8/7-3/8*8/5

_______________________=________________=_________________=

             1/5:5                          1/5:5/1                 1/5*1/5

 

       49/32-3/5         245/160-96/160

=_______________=________________=149/160:1/25=149/160*25/1=

       1/25                        1/25

 

=745/32=23 9/32

 

 

c)   (3 2/5-2 3/4):2 1/12       (17/5-11/4):25/12     (68/20-55/20):25/12

_______________________=__________________=___________________=

      1 1/2* 1 7/9-2/3              3/2*16/9-2/3                 8/3-2/3

 

    13/20*12/25       39/125

=_____________=_________= 39/125:6/3=39/125*3/6=39/250

       6/3                   6/3