Question

2 points
4. We use our
finger
to subtract the upper beads.
O a) Middle
O b) Index
O c) Thumb
O d) Little​

Answer 1

Answer:

I can't understand your question please write properly

Answer 2

Answer:

a) Middle

Step-by-step explanation:

In abacus we use our thumb to add or subtract the lower bead while we use the middle finger to add or subtract any upper bead