m.c.m 52 y 76
Factorizas cada número
52 = 2.2..13 76 =2.2.19
MCM (52,76) = 2² .19.13
MCM (52,76) = 988
mcm: 81 y 95
81= 3.3.3.3
95 = 5.19
MCM (81,95) = 3^4 .5.19
MCM (81,95) = 7695
mcm: 105 y 210
105 = 3.5.7
210= 2.3.5.7
MCM (105,210) = 2.3.5.7
MCM (105,210)= 210
mcm:380 y 420
380=2.2.5.19
420= 2.2.3.5.7
MCM (380,420) = 2².3.5.7.19
MCM (380, 420) = 7980
mcm: 590 y 711
590= 2.5.59
711 = 3.3.79
MCM (590,711) = 2.9.5.59.79
MCM (590,711) = 419490
mcd: 40y 60
factorizas los numeros y el MCD son los comunes con su menor potencia
40= 2.2.2.5
60= 2.2.3.5
MCD (40;60) = 2².5
MCD (40,60) = 20
mcd: 35 y 48
35= 5.7
48= 2.2.2.2.3
MCD (35,48) = no hay
mcd: 100 y 150
100= 2.2.5.5
150 = 2.3.5.5
MCD (100, 150) = 2.5²
MCD (100, 150) = 50
mcd: 225 y 300
225 = 3.3.5.5
300 = 2.2.3.5.5
MCD (225,300) = 5².3
MCD (225,300) = 75
mcd: 70 y 62
70 = 2.5.7
62= 2.31
MCD (70,62) = 2
mcd: 415 y 520
415= 5.83
520 = 2.2.2.5.13
MCD (415,520) = 5
espero que te sirva, salu2!!!