Halloween Operations with Rational Numbers Math Hunt - Adding, Subtracting, Multiplying, and Dividing Positive and Negative Fractions and Decimals, Order of Operations, Positive and Negative Fractions on a Number Line, Distance on a Number Line. In this Math Challenge, students find and mark rational numbers on a horizontal number line; add, subtract, multiply, and divide positive and negative numbers (fractions and decimals), including order of operations; calculate the distance between t