Question

Oblicz
a)2/3*(2 5/6+1,75)
b)(4 7/8-2,5)*1 1/3
d)1 4/5:(8 13/25-1,5)
e)3 1/2 *(1 3/5+2,75)
f) 1 2/3:(5,5*2 2/11-3 2/3)
g)1 2/3+2 3/4*(8 2/5-7 3/20
h)2,3+0,75:5-1,95-2 1/3
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4-1,5 9,35-2,6
i)28 3/5-0,6*(8 2/3 -3 1/4+2 1/2-5/12)

Answer 1

A) 2/3*(2 5/6+1,75)=2/3*(17/6+175/100)=2/3*(850/300+525/300)=2/3*1375/300=55/18=3 1/18
b) (4 7/8-2,5)* 1 1/3=(39/8-25/10)*4/3=(195/40-100/40)*4/3=95/40*4/3=19/6=3 1/6
d) 1 4/5:(8 13/25-1,5)=9/5:(213/25-15/10)=9/5:(426/50-75/50)=9/5:351/50=9/5*50/351=10/39
e) 3 1/2*(1 3/5+2,75)=7/2*(8/5+275/100)=7/2*(160/100+275/100)=7/2*435/100=609/40=15 9/40
f) 1 2/3:(5,5*2 2/11-3 2/3)=5/3:(55/10*24/11-11/3)=5/3:(12/1-11/3)=5/3:(36/3-11/3)=5/3:25/3=5/3*3/25=1/5
g) 1 2/3+2 3/4*(8 2/5-7 3/20)=5/3+11/4*(42/5-143/20)=5/3+11/4*(168/20-143/20)=5/3+11/4*25/20=5/3+275/80=400/240+825/240=1200/240=5
h) niewiem
i) 28 3/5-0,6*(8 2/3-3 1/4+2 1/2-5/12)=143/5-6/10*(26/3-13/4+5/2-5/12)=143/5-6/10*(104/12-39/12+30/12-5/12)=143/5-6/10*90/12=143/5-9/2=286/10-45/10=241/10=24/1