_.round(number, [precision=0])

_.multiply(multiplier, multiplicand)

_.add(augend, addend)

_.subtract(minuend, subtrahend)

_.minBy(array, [iteratee=_.identity])

_.maxBy(array, [iteratee=_.identity])

_.ceil(number, [precision=0])

_.divide(dividend, divisor)

_.sum(array) source

_.floor(number, [precision=0])