Vertical title card: Mathematics is a book. Harbin Publishing House published 0 1 to 0 1 in 2009. It is also a mathematical problem of pure arithmetic.

"Vertical Question Card: Mathematics (Grade 5)" is a vertical math problem for primary school students, the latest measure, vertical question card.

The unique style is conducive to improving primary school students' interest in learning and making them think hard and develop their brains. There are also positive answers behind the questions for students' reference.