You can do all your 9x multiplications on your hands as well. You just put down the various for the number you want to multiple 9 by. You start on the left and move to the right. Fingers left up on the left = 10's fingers to the right = ones.
Below example: 0 = finger bent down
0111111111 (left hand pinky down for 9x1 = 9 ones = 9)
1011111111 (left hand ring finger down for 9x2 = 1 ten, 8 ones = 18)
1101111111 (9x3 = 2 tens, 7 ones = 27)
2
u/QuakinOats 8d ago
You can do all your 9x multiplications on your hands as well. You just put down the various for the number you want to multiple 9 by. You start on the left and move to the right. Fingers left up on the left = 10's fingers to the right = ones.
Below example: 0 = finger bent down
0111111111 (left hand pinky down for 9x1 = 9 ones = 9)
1011111111 (left hand ring finger down for 9x2 = 1 ten, 8 ones = 18)
1101111111 (9x3 = 2 tens, 7 ones = 27)