subject
Mathematics, 24.03.2021 22:50 reinasuarez964

In Robert Recorde's Grounde of Artes (1541), an arithmetic text for algorists and abacists, Recorde gave an rule for multiplying two one-digit numbers greater than 6. Here is the rule: first subtract each number from 10. The product of the two differences you get is the units digit in the product of the original numbers, and if you subtract one of the differences from the other original number, you get the tens digit in the product of the original numbers. A) Show two examples of this method.
B) Prove that it works.

ansver
Answers: 2

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 18:00, Sallyjoe9630
Find the equation using the point (4,8)
Answers: 2
image
Mathematics, 21.06.2019 19:10, jeanieb
What is the absolute value of the complex number -4-sqrt2i
Answers: 2
image
Mathematics, 21.06.2019 19:30, ellarose0731
Hi, can anyone show me how to do this problem? 100 points for this. in advance
Answers: 2
image
Mathematics, 21.06.2019 19:30, miracle96
Choose the more precise measurement. 26.4 cm or 8.39 cm
Answers: 1
You know the right answer?
In Robert Recorde's Grounde of Artes (1541), an arithmetic text for algorists and abacists, Recorde...

Questions in other subjects:

Konu
Mathematics, 16.04.2021 18:40