Ayuda:Como Se Calcula;
1:3/7-1/7
2:2/5por1/9
3:1/15:4/7
4:10+(15por -2)
1:3/7-1/7
2:2/5por1/9
3:1/15:4/7
4:10+(15por -2)
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2/5×1/9= 2/45
1/15÷4/7= 7/60
10+(15×-2)= 10+(-30)= 10-30= -20