Computational tasks with mixed addition, subtraction, multiplication, and division Ver3 Computational tasks with mixed addition, subtraction, multiplication, and division Ver3_001 Computational tasks with mixed addition, subtraction, multiplication, and division Ver3_002 Computational tasks with mixed addition, subtraction, multiplication, and division Ver3_003 Computational tasks with mixed addition, subtraction, multiplication, and division Ver3_004 Computational tasks with mixed addition,