Ответ:
1/5=1×10/5×10=10/50
4/5=4×10/5×10=40/50
3/10=3×5/10×5=15/50
11/25=11×2/25×2=22/50
1/2×1×25/2×25=2/50
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Ответ:
1/5=1×10/5×10=10/50
4/5=4×10/5×10=40/50
3/10=3×5/10×5=15/50
11/25=11×2/25×2=22/50
1/2×1×25/2×25=2/50