Respuesta:
1.
18-20=2
9-10=2
9-5=5
9-5=9
1-1
2x2x5x9=180
30-60=2
15-30=2
15-15=3
5-5=5
2x2x3x5=60
21-9-15=3
7-3-5=3
7-1-5=5
7-1-1=7
1-1-1
3x3x5x7=315
2.
12-36=2
6-18=2
3-9=3
1-3
2x2x3=12
12-18-24=2
6-9-12=3
2-3-4
2x3=6
42-36-54=2
21-18-27
7-6-9
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Respuesta:
1.
18-20=2
9-10=2
9-5=5
9-5=9
1-1
2x2x5x9=180
30-60=2
15-30=2
15-15=3
5-5=5
1-1
2x2x3x5=60
21-9-15=3
7-3-5=3
7-1-5=5
7-1-1=7
1-1-1
3x3x5x7=315
2.
12-36=2
6-18=2
3-9=3
1-3
2x2x3=12
12-18-24=2
6-9-12=3
2-3-4
2x3=6
42-36-54=2
21-18-27
7-6-9
2x3=6