Math Monster Multiplication - Learning Connections Essential Skills Mental Math - multiply numbers by memory or through other efficient methods. What is the area of a circle whose diameter is 12cm? Practice the times tables while having fun at basic math jeopardy I. additon, subtraction, multiplication, division, rounding. Fourth Grade Common Core Math Jeopardy Game - Multiplication As A Comparison Word Problems 4.OA.1 Practice provides two ways for students to practice and show mastery of their ability to interpret a multiplication equation as a comparison.