A simple method of (1 / 12-1 / 4) / 1 / 2 + 1 / 3

A simple method of (1 / 12-1 / 4) / 1 / 2 + 1 / 3

(1/12-1/4)/1/2+1/3
=(1/12-1/4)×2+1/3
=1/6-1/2+1/3
=1/6+1/3-1/2
=1/2-1/2
=0

In 1956, 59, 60, 61, 62, 63, 64, 74, 75, 77, 78, 79, 81, 82, 83, 86, 87 and 90, there were 100 dimes in total, probably worth more than 100

No one is valuable. 2 points is only 80 years worth, and the price is 1000 yuan

How to determine the 0 in the abacus? For example, 63911 divided by 79 equals 809. Why do I always type 89

63911 divided by 79, 6363 divided by 79 can't divide 639 divided by 79, because one digit in this case gets 8 63. If it can be divided by 79, it should get 08. The bottom is the abacus formula, the addition formula table doesn't carry, the addition formula table doesn't carry, the addition formula directly adds five plus ten plus five plus five plus ten plus one up one down five go four one go nine into one two up two down