100 Horizontal Mixed Operations Questions (Facts 1 to 12) (A) - Math-Drills Students can use math worksheets to master a math skill through practice, in a study group or for peer tutoring. Use the buttons below to print, open, or download the PDF version of the 100 Horizontal Mixed Operations Questions (Facts 1 to 12) (A) math worksheet. The size of the PDF file is 23975 bytes.