Question

Oblicz pamiętajać o kolejności wykonywania działań.

1. 1,4 : 1/2+1/30 * 7,5 =

2. (0,76:4/5-0,5)* 1 1/3=

3.[(13-11 1/2) : 0,03]*0,026=

4.[1 5/7 :( 3,6-1,8 * 1 1/3)] * 1,4

Answer 1

1. 14/10:1/2=14/10*2/1=14/5

2. (0,76:0,8-0,5)*4/3=(0,95-0,5)*4/3=0,45*4/3=45/100*4/3=15/25 

 

Answer 2

1 ) = 14/10 : 1/2 + 1/30 * 75/10 = 7/5:1/2 + 1/30*15/2 = 7/5*1/2 + 1/4 = 7/10 +1/4= 28/40 +10/40 = 38/40

2) = (76/100 : 4/5 - 5/10) * 4/3 = (76/100*5/4 - 5/10)* 4/3 = (19/20 - 5/10) * 4/3 = (19/20 - 10/20) * 4/3 = 9/20* 4/3 = 3/5

3) = [(13/1-23/2):3/100]* 26/1000= [(26/2-23/2):3/100]*26/1000= (23/2*100/3)*26/1000 = 1150/3*26/1000 = 598/60 = 9 i 58/60

4) = [12/7 : ( 36/10- 18/10 * 4/3)]*1/4 = [ 12/7: (36/10 - 10/5)] * 1/4= [12/7 :(36/10- 20/10)]*1/4 = (12/7:16/10)*1/4 = (12/7 * 10/16)*1/4 = 30/28*1/4 = 15/56