Answer:
シ+二 Katakana "Shi" / NI, futa(tsu), futa - two
イ+二 Katakana "I" / NI, futa(tsu), futa - two
イ+三 Katakana "I" / SAN, mi(tsu), mi(ttsu), mi - three
言+一 GEN, GON, i(u), koto - say, speech / ICHI, ITSU, hito(tsu) - one
金+一 KIN, kane - gold / ICHI, ITSU, hito(tsu) - one
Add | (The "Tatebou" radical - vertical stroke), to make them something different!
汗 KAN, ase - sweat
仕 SHI, JI, tsuka(eru) - serve
任 NIN, maka(seru) - entrust, responsibility
計 KEI, haka(ru), haka(rau) - plan, total, measure
針 SHIN, hari - needle