...start decreasing for small gusset behind thumb, the 10 cast on sts, on every other rnd 3 times, see chart = 60 or 66 sts remain.
Here you can see how to do ssk = slip,slip, knit together
Here you can see k2tog = knit two together
Thumgusset and small gusset over thumbhole.
Knit arund until glove reaches base of little finger, about 3,5-4,5 cm above thumbhole. Now you can weave in ends from the roositud.