12万

• one thousand twenty hundred
• one hundred twenty thousands
• twenty million
• one hundred twenty thousand

何百もの〜

• hundred of ~
• hundreds of ~
• one hundred of ~
• some hundreds of ~

何十もの〜

• ten of ~
• tens of ~
• dozen of ~
• dozens of ~

10代の男子

• his teens
• his tens
• his teen
• his ten

2030年代に

• the 2030s
• in the 2030s
• on the 2030s
• at the 2030s

2020年代後半において

• on the latter 1980
• in the 1980s after
• in the late 1980s
• on the latter half of the 1980s

21世紀の〜

• in the 21th century
• of the 21th century
• in 21st century
• of the 21st century

4分の3

• three quarters
• three quarter
• quarters three
• quarter three

3分の2

• three two
• third two
• two third
• two thirds

2分の1

• a half
• a two
• a second
• two falf