Ответ:
7×3/4=7/1×3/4=21/4=5 1/4
6/35×7/12=1/5×1/2=1/10
1/5+1/2=2/10+5/10=7/10
3/8+1/4=3/8+2/8=5/8
1/3-1/5=5/15-3/15=2/15
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Ответ:
7×3/4=7/1×3/4=21/4=5 1/4
6/35×7/12=1/5×1/2=1/10
1/5+1/2=2/10+5/10=7/10
3/8+1/4=3/8+2/8=5/8
1/3-1/5=5/15-3/15=2/15