OCTOBER 22 1898. OUR FINGERS AS AN AID IN MULTIPLICATION. Fig. 1Multiplying 9 X 9. Fig 2Multiplying 9 X 8. Fig 8Multiplying 7 X 7. Fig. 12Multiplying 16 x 17 Fig. 6Multiplying 8 X '7. RAPID METHOD OF MULTIPLICATION WITH THE FINGERS., scientific american, 1898-10-22

- Image ID: 2ABXH9D
OCTOBER 22 1898. OUR FINGERS AS AN AID IN MULTIPLICATION. Fig. 1Multiplying 9 X 9. Fig 2Multiplying 9 X 8. Fig 8Multiplying 7 X 7. Fig. 12Multiplying 16 x 17 Fig. 6Multiplying 8 X '7. RAPID METHOD OF MULTIPLICATION WITH THE FINGERS., scientific american, 1898-10-22
Penta Springs LLP / Alamy Stock Photo
Image ID: 2ABXH9D
OCTOBER 22 1898. OUR FINGERS AS AN AID IN MULTIPLICATION. Fig. 1Multiplying 9 X 9. Fig 2Multiplying 9 X 8. Fig 8Multiplying 7 X 7. Fig. 12Multiplying 16 x 17 Fig. 6Multiplying 8 X '7. RAPID METHOD OF MULTIPLICATION WITH THE FINGERS., scientific american, 1898-10-22