Question

tak będę pisała ułamki zwykłe np. 1/6 to jest jedna szósta

1.Oblicz.

a)3,375 + 4 1/6- 2 2/3=

b)10 2/3 - 4 7/8+5/6=

c)5.25 - 2 2/3-1 5/6=

d)4,5 + 6 3/4-(12-5 3/8)=

e)8 1/2 - 1.75 -(1 3/4+1 2/3)=

f)4 5/6 +2,5 -3 2/3+5 1/12=

Answer 1

a) 3,375 + 4 1/6 - 2 2/3 = 3 375/1000 + 4 1/6 - 2 2/3 = 3 3/8 + 4 1/6 - 2 2/3 = 3 9/24 + 4 4/24 - 2 16/24 = 7 13/24 - 2 16/24 = 6 37/24 - 2 16/24 = 4 21/24 = 4 7/8

 

b) 10 2/3 - 4 7/8 + 5/6 = 10 16/24 - 4 21/24 + 20/24 = 9 40/24 - 4 21/24 + 20/24 = 5 19/24 + 20/24 = 5 39/24 = 6 15/24

 

c)5,25 - 2 2/3 - 1 5/6 = 5 1/4 - 2 2/3 - 1 5/6 = 5 8/12 - 2 8/12 - 1 10/12 = 3 - 1 10/12 = 2 12/12 - 1 10/12 = 1 2/12 = 1 1/6

 

d) 4,5 + 6 3/4 - (12 - 5 3/8) = 4 1/2 + 6 3/4 - (11 8/8 - 5 3/8) = 4 2/4 + 6 3/4 - 6 5/8 = 10 5/4 - 6 5/8 = 10 10/8 - 6 5/8 = 4 5/8

 

e) 8 1/2 - 1,75 - (1 3/4 + 1 2/3) = 8 1/2 - 1 3/4 - (1 9/12 + 1 8/12) = 8 2/4 - 1 3/4 - 1/12 = 7 6/4 - 1 3/4 - 1/12 = 6 3/4 - 1/12 = 6 9/12 - 1/12 = 6 8/12 = 6 2/3

 

f)4 5/6 + 2,5 - 3 2/3 + 5 1/2 = 4 5/6 + 2 1/2 - 3 2/3 + 5 1/2 = 4 5/6 + 2 3/6 - 3 4/6 + 5 3/6 = 6 8/6 - 3 4/6 + 5 3/6 = 3 4/6 + 5 3/6 = 2 1/6

Answer 2

a) = 3375/1000 + 25/6-8/3= 10125/3000 + 12500/3000-8000/3000 = 14625/3000=4,875

b)= 32/3 - 39/8 + 5/6 = 256/24-117/24+20/24= 159/24 = 6 15/24

c)= 5 25/100 - 2 2/3 - 1 5/6= 525/100 - 8/3 - 11/6 = 1575/300 - 800/300 - 550/300 = 225/300 = 0,75

 

d) = 4 5/10 + 6 3/4 - (12/1 - 43/8)= 45/10 +27/4 - (98/8 - 43/8)= 180/40 + 270/40 - 53/8= 450/40 - 53/8 = 450/40-265/40 = 185/40 = 4,625

 

e)= 17/2-175/100-(7/4+5/3)= 17/2 -175/100-(21/12+20/12)= 17/2 -175/100-41/12= 5100/600-1050/600-2050/600 = 2000/60 = 200/6 = 33  2/6

 

f)=29/6+25/10-11/3+60/12= 870/180+450/180-660/180 + 5 = 660/180+5 = 3 120/180 + 5 = 3 2/3 + 5 = 8  2/3

 

 

Proszę :) Mam nadzieję, że pomogłam. Operowałam dużymi liczbami :)