MathNook Math Games by Grade Level
MathNook Math Games by Category
Create and drop weights on the two scales to try and balance them out. No time limit in this game with 20 levels for you to complete.
Calculate the time to the nearest hour shown on the clock. Simple to play without any time limit.
Estimation Genius 2
Estimate how many puppies are in the image. No time limit in this game but the image disappears after a short time.