VERTICAL
Vertical drill, aligned by place.
Random column problems with digits aligned. Fill the boxes and click “Grade”, or reveal the answer.
6
7
+
5
5
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Solution animation · how the column works
Col 2: 7 + 5 = 12 → write 2, carry 1
What is this?
Problems are generated by operation and digit count, aligned by place value. Fill the result and grade; multiplication uses the final product.
示例与注意事项Example & notes
一个例子A worked example
算 427 − 158：按数位对齐逐位相减，个位不够减要向前借一，页面会高亮借位的那一位。Compute 427 − 158 column by column; when a digit is too small you borrow, and the borrowed position is highlighted.
注意事项Things to watch
- 数位必须对齐（个位对个位），错位是竖式最常见的错误来源。Columns must line up — misalignment is the usual source of vertical-form mistakes.
- 连续借位（如 1000 − 1）要专门练，很多孩子在这里卡住。Consecutive borrowing such as 1000 − 1 needs dedicated practice.
- 小数竖式要先把小数点对齐，缺位补零再计算。For decimals align the decimal points first and pad with zeros.
相关问答More Q&A
能自动批改吗？Does it mark my answer?
可以，输入答案后逐位比对，并标出出错的那一位。Yes — it compares digit by digit and highlights where it went wrong.
支持乘除法竖式吗？Are multiplication and division included?
支持加减乘除四则，除法会显示试商过程。All four operations are covered, and division shows the trial-quotient steps.