Mathematical problems in abacus calculation

Wow, there is abacus math now, damn it (` o').

Judging from the meaning of the question.

Let one digit be X, then the ten digits are X-3 and the hundred digits are X-4. So the maximum value of X is 9 (digits are 1 digits), and it takes 8 beads to dial 569, so I gave up. Next, I tried 458, which is 9,347, which is 10. In the end, only 458 can do it.

Do you understand (⊙o⊙)?

Teaching plan for comparing the nature and size of decimals in the second volume of mathematics in grade four.

The composition material is strong and the topic is good.

Mathematics, mathematics, loving mathematics is equal to learning mathematics. What is love equal to? What is the number? What is learning equal to?

Mathematical stories in the second volume of the third grade

Please recommend this book for the second round of college entrance examination.

What mathematics textbooks do Nanjing University of Finance and Economics try for the cross-disciplinary examination of accounting major? Who wrote it? Which publishing house?

What are the total number of the second volume of mathematics in grade five within 100?

How to Cultivate Students' Spatial Imagination Ability in Mathematics Teaching

Junior high school mathematics. In a square ABcD, p is on ray CB.

Guangdong Jiaoling 20 16 has several subjects in the senior high school entrance examination.