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b)0,65:6 1/2= 0,65:6,5 =0,1
c) 4,5-3/4*1/3=4 1/2-3/12=4 6/12-3/12= 4 3/12=4 1/4
d)1 2/5+0,5) :2=(1,4+0,5):2= 1,9:2=0,95
e)5/8 * 4,2-(1/4) pot 2= 5/8*4 2/10-(1/4) pot 2=1/8-1/16=2/16-1/16=1/16
f) 4/7*(0,2+1/4)=4/7*(2/10+1/4)=4/7*(4/20+5/20)=4/7*9/20= 36/140=18/70=9/35
b)0,65:6 1/2= 0,65:6,5 =0,1
c) 4,5-3/4*1/3=4 1/2-3/12=4 6/12-3/12= 4 3/12=4 1/4
d)1 2/5+0,5) :2=(1,4+0,5):2= 1,9:2=0,95
e)5/8 * 4,2-(1/4) pot 2= 5/8*4 2/10-(1/4) pot 2=1/8-1/16=2/16-1/16=1/16
f) 4/7*(0,2+1/4)=4/7*(2/10+1/4)=4/7*(4/20+5/20)=4/7*9/20= 36/140=18/70=9/35