การลบเลขทศนิยม แผ่นงาน

Start with a place-value chart so students see why tenths must line up with tenths and hundredths with hundredths. Model rewriting numbers with placeholder zeros, then subtract from right to left and regroup as needed. Have students estimate first so they can judge whether the final difference is reasonable.

Use a short progression: decimals with the same number of places, decimals of different lengths, and applications involving money or measurement. Include problems that require regrouping as well as a few error-analysis tasks in which students correct a misaligned calculation.

Students often align the last digits instead of the decimal points, omit placeholder zeros, or regroup incorrectly across a zero. Another useful check is magnitude: subtracting a smaller positive decimal should not produce an answer larger than the starting number.

Host the worksheet as a digital quiz on Wayground or download the printable PDF and assign it on paper. Every worksheet has a complete answer key, and teachers can scan or capture paper submissions for grading with the Wayground for Teachers app.

Common Core develops decimal subtraction from place-value understanding and whole-number subtraction strategies. Students then apply the operation to decimals through hundredths before using decimal computation in measurement, data, and multi-step problems.

Give students who struggle with alignment a large-font version with wider spacing so each place-value column stays clear. For digital practice, extended time can support careful regrouping, while reduced answer choices can make error-analysis questions more manageable.