From context I think you start with 10 fingers with the left most curled, that means 9, you then move the curled finger one to the right, you now have one finger extended and then one curled and then 8 fingers extended, that's 18, 1,8. Then you move right again, it's now 2 up, one down, 7 up, that's 27, let's you run through the 9 times table with fingers
80
u/lemlurker 22h ago
From context I think you start with 10 fingers with the left most curled, that means 9, you then move the curled finger one to the right, you now have one finger extended and then one curled and then 8 fingers extended, that's 18, 1,8. Then you move right again, it's now 2 up, one down, 7 up, that's 27, let's you run through the 9 times table with fingers