Primary Math Column Calculation Worksheet PDF Generator

The Problem

Creating primary math column-calculation worksheets by hand often leads to inconsistent difficulty, irregular remainders, or mixed operations that exceed elementary constraints. This skill turns those rules into reproducible generation logic for multiplication, exact division, division with remainder, chained addition/subtraction, and mixed operations.

How It Works and Limitations

• Outputs an A4 PDF with 2 columns × 5 rows per page, 10 questions per page, and about 3.0cm vertical space per question; the final page contains full answers, with remainders shown for division.
• Enforces explicit constraints: divisors are 2-9; mixed-operation division must be exact; parentheses only contain addition/subtraction, avoiding two-digit divisors from patterns like a ÷ (b + c).
• Supports --count and type ratios for multiplication, division, chained arithmetic, and mixed operations; --title and --output can be overridden.
• Requires Python 3.8+ and reportlab, with font fallback to Microsoft YaHei, STHeiti, or NotoSansCJK; preview the PDF before printing across platforms.