If you are talking about dividing numbers or objects into two equal parts, the expression to use is “divide in half,” not “divide by half.”

Technically, to divide a number by 1/2 is the same as to multiply it by 2.

See also “multiply by double.”

If you are talking about dividing numbers or objects into two equal parts, the expression to use is “divide in half,” not “divide by half.”

Technically, to divide a number by 1/2 is the same as to multiply it by 2.

See also “multiply by double.”