How to do the fifth question in the first volume of fifth grade mathematics (1 1)
The answer (1) only needs to prepare weights of seven sizes: 1g, 2g, 4g, 8g, 16g, 32g and 64g.
1+2+4+8+ 16+32+64= 127
(2) Li Shifu must also prepare the weights of the above seven specifications, otherwise it can't weigh 1- 12 1 g of gold in different integer grams at a time.