Respuesta:
1-. 3/8 + 1/5= 15/40 + 8/40= 23/40
2-.7/2 + 3/4= 14/4 + 3/4= 17/4
3-.2/3 + 7/4 + 6/8= 16/24+42/24+18/24=76/24=3 4/24
4-.5/4+7/8+9/11= 110/88+77/88+72/88=259/88=2 83/88
5-.3/4-4/12=9/12-4/12=5/12
6-.5/7-1/2=10/14-7/14=3/14
7-.9/11-1/3=27/33-11/33=16/33
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Verified answer
Respuesta:
1-. 3/8 + 1/5= 15/40 + 8/40= 23/40
2-.7/2 + 3/4= 14/4 + 3/4= 17/4
3-.2/3 + 7/4 + 6/8= 16/24+42/24+18/24=76/24=3 4/24
4-.5/4+7/8+9/11= 110/88+77/88+72/88=259/88=2 83/88
5-.3/4-4/12=9/12-4/12=5/12
6-.5/7-1/2=10/14-7/14=3/14
7-.9/11-1/3=27/33-11/33=16/33