Vocab 5.1 Number Words

The word that means "ten" is _______.

• dec, decim

• cent, centi

• quad, quadri

• oct, octa

Fill in the blank: A 10-year period is called a _______.

• decade

• century

• millennium

• fortnight

Fill in the blank: A polygon with 10 sides or angles is called a _______.

• decagon

• hexagon

• octagon

• pentagon

Fill in the blank: Originally, the 10th month in the Roman calendar; the 12th month in the modern calendar is called _______.

• December

• October

• January

• March

Fill in the blank: A mathematical symbol indicating 1/10 of a number is called a _______.

• decimal

• fraction

• integer

• percent

Fill in the blank: To reduce by 1/10; to destroy a great number or proportion from a population or area is to _______.

• decimate

• amplify

• multiply

• enrich

Fill in the blank: The word that means "one hundred" is _______.

• cent

• milli

• deci

• kilo

Fill in the blank: 100 dollars is called a _______.

• cent

• grand

• buck

• note

Fill in the blank: A person in his or her 100s is called a _______.

• centenarian

• octogenarian

• millenarian

• septuagenarian

Fill in the blank: Divided into 100 degrees from freezing to boiling is called _______.

• centigrade

• Fahrenheit

• Kelvin

• Rankine