8 i 1/4 x 4/5 = ........
4 i 4/7 : 2 i 2/3 = ........
1 i 2/9 x 2 i 3/11 = ........
5 i 3/5 : 1 i 1/7 = ........
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8 i 1/4 x 4/5 = 3/4*4/5=132/20=6 i 12/20=6 i 6/10=6 i 3/5
4 i 4/7 : 2 i 2/3 =32/7:8/3=32/7*3/8=96/56=1 i 40/56=1 i 20/29
1 i 2/9 x 2 i 3/11 =11/9*25/11=275/99=2 i 86/99
5 i 3/5 : 1 i 1/7 =28/5:8/7=28/5*7/8=196/40=4 i 16/40=4 i 4/10=4 i 2/5