thirty

Everyday

1. Thirty is the number 30. It is three tens. tree →
2. Half an hour is 30 minutes. tree →
3. Many months have 30 days. tree →

In the lessons

Maths: a number of things; minutes in half an hour; days in many months; counting in tens. Everyday: «half past» on a clock means thirty minutes past the hour; ages, prices, speed limits.

Examples

• There are thirty children in the class. tree →
• He waited thirty minutes. tree →
• Thirty is three times ten. tree →
• She saved thirty dollars. tree →
• Half an hour is thirty minutes. tree →
• April, June, September and November have thirty days. tree →
• The speed limit here is thirty miles an hour. tree →
• I've been living in the forest for thirty years. tree →

Note

A number written in words; read it as 30. Half an hour is thirty minutes. Trap: do not confuse thirty (30) with thirteen (13).

In Jewish tradition

Maths: a number of things; minutes in half an hour; days in many months; counting in tens. Everyday: «half past» on a clock means thirty minutes past the hour; ages, prices, speed limits.

Examples

• and thirty and six thousand beeves, (Torah NUM.31.44, JPS 1917) tree →
• and thirty thousand and five hundred asses, (Torah NUM.31.45, JPS 1917) tree →
• And Shelah lived thirty years, and begot Eber. (Torah GEN.11.14, JPS 1917) tree →
• All the kings thirty and one. (Prophets JOS.12.24, JPS 1917) tree →
• The children of Senaah, three thousand nine hundred and thirty. (Writings NEH.7.38, JPS 1917) tree →
• The children of Senaah, three thousand and six hundred and thirty. (Writings EZR.2.35, JPS 1917) tree →

Note

A number written in words; read it as 30. Half an hour is thirty minutes. Trap: do not confuse thirty (30) with thirteen (13).