1.Oblicz, pamiętając o kolejności wykonywania działań.
a) 4 i 1/5*2,7 : 5,67=
b) 1,4 : 1/2 + 1/30 * 7,5=
c) (8 i 1/2 - 4,75) : 15=
d) (0,76 : 4/5 - 0,5) * 1 i 1/3=
e) [(13-11 i 1/2) : 0,03] * 1,4=
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a) 4 i 1/5*2,7 : 5,67= 21/5 * 27/10 : 5 67/100 = 567/50 : 567/100 = 567/50 * 100/567 = 2/1 = 2
b) 1,4 : 1/2 + 1/30 * 7,5= 1 4/10 : 1/2 + 1/30 * 75/10 = 14/5 + 75/300 = 840/300 + 75/300 = 915/300 = 3 1/20
c) (8 i 1/2 - 4,75) : 15= (850/100 - 475/100) * 5 = 375/100 : 5 = 0.75
d) (0,76 : 4/5 - 0,5) * 1 i 1/3= (76/100 * 5/4 - 0,5) * 1 1/3 = (19/20 - 5/100 * 1 1/3 = 9/20 * 4/3 = 3/5
e) [(13-11 i 1/2) : 0,03] * 1,4= [ (13/1 - 23/2) : 0.03 ] * 1.4 = [ ( 26/2 - 23/2 ) : 0.03 ] * 1.4 = [3/2 : 3/100] * 1.4 = (3/2 * 100/3) * 1.4 = 50 * 14/10 = 70
a) 4 i 1/5*2,7 : 5,67= 4,2*2,7:5.67=11,34:5,67
b) 1,4 : 1/2 + 1/30 * 7,5=1,4:0,5+1/30*7,5=2,8+0,25=3,05
c) (8 i 1/2 - 4,75) : 15=(4-4,75):15=-0,75:15=-0,05
d) (0,76 : 4/5 - 0,5) * 1 i 1/3=(0,76:0,8-0,5)*4/3=0,45*4/3=0,6
e) [(13-11 i 1/2) : 0,03] * 1,4=[(13-11,5):0.03]*1,4= (1,5:0,03)*1,4=50*1,4=70