Volume of a right cylinder
A state department of education, as a question on the public-release form of a statewide standardized…
STEM
Daily Math Puzzle – Time Dilemma
Taken from Project Gutenberg’s Amusements in Mathematics, by Henry Ernest Dudeney, originally published ca. 1917 ……
Estimating the circumference of a circle
A state department of education, as a question on the public-release form of a statewide standardized…
Representing whole numbers and place values
A state department of education, as a question on the public-release form of a statewide standardized…
President declares swine flu a national emergency
The president declared a national emergency concerning swine flu, a move that resembled the declaration of an emergency during a strong hurricane.
Using subtraction to solve word problems
A state department of education, as a question on the public-release form of a statewide standardized…
Adding a percent of a number to a number
A state department of education, as a question on the public-release form of a statewide standardized…
Dividing fractions (rational numbers)
A state department of education, as a question on the public-release form of a statewide standardized…
New multiplication: squares, diagonals, lattices
You may have noticed your child multiplying two- and three-digit numbers in a way that looks…
What is a mole (Avogadro’s Number)?
A “mole” is just a number. There are many wordy definitions of a mole to be…