天平砝码重量有:1g,2g,5g,10g.
1G:1G砝码X1
2G:2G砝码X1
3G:1G砝码X1+2G砝码X1
4G:2G砝码X2
5G:5G砝码X1
6G:5G砝码X1+1G砝码X1
7G:5G砝码X1+2G砝码X1
8G:5G砝码X1+1G砝码X1+2G砝码X1
9G:5G砝码X1+2G砝码X2
10G:10G砝码X1
11G:10G砝码X1+1G砝码X1
12G:10G砝码X1+2G砝码X1
13G:10G砝码X1+2G砝码X1+1G砝码X1
14G:10G砝码X1+2G砝码X2
15G:10G砝码X1+5G砝码X1
1G砝码最多需要:1只
2G砝码最多需要:2只
5G砝码最多需要:1只
10G砝码最多需要:1只
所以至少需要准备5只砝码