Explicación paso a paso:
1/10 + 3/5= 1/10+6/10= 7/10
2/9 + 1/18= 4/18+1/18= 5/18
1/5 + 2/10= 2/10+2/10= 4/10
3/5 - 2/15= 9/15-2/15= 7/15
4/8 + 2/4= 4/8+4/8= 8/8= 1
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Explicación paso a paso:
1/10 + 3/5= 1/10+6/10= 7/10
2/9 + 1/18= 4/18+1/18= 5/18
1/5 + 2/10= 2/10+2/10= 4/10
3/5 - 2/15= 9/15-2/15= 7/15
4/8 + 2/4= 4/8+4/8= 8/8= 1