a) 9 = 3² 8/9 si 9/7, amplifici 8·7/63 si 9·9 /63
7 = 7 56/63 si 81/63
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c.m.m.m.c = 3²·7 = 9·7 = 63
b) 4 = 2²
7 = 7
3 = 3
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c.m.m.m.c. = 2²·3·7 = 4·21 = 84
c) 11 = 11
4 = 2²
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c.m.m.m.c. = 2²·11 = 4·11 = 44
d) 5 = 5
7 = 7
6 = 2·3
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c.m.m.m.c. = 2·3·5·7 = 6·35 =210
e) 12 =2²·3
8 = 2³
48 = 2²·2²·3 = 2⁴·3
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c.m.m.m.c. = 2⁴· 3 = 16·3 = 48
f) 35 = 5·7
70 = 2·5·7
140 = 2²·5·7
============
c.m.m.m.c. = 2²·5·7 = 140
Sper ca ti-am fost de ajutor!