Grade 6 test questions on subtracting unequal decimals

📚 Quick Study Guide

🔢 Understanding Decimals: Decimals represent parts of a whole number. Each digit after the decimal point represents a fraction with a denominator of 10, 100, 1000, and so on. For example, 0.3 is $\frac{3}{10}$ and 0.25 is $\frac{25}{100}$. 📍 Aligning Decimal Points: When subtracting decimals, the most important step is to align the decimal points vertically. This ensures that you are subtracting the same place values (tenths from tenths, hundredths from hundredths, etc.). ➕ Adding Zeros: If one decimal has fewer digits after the decimal point than the other, you can add zeros to the end of the shorter decimal without changing its value. This makes the subtraction process easier. ➖ Subtracting: Once the decimal points are aligned, subtract the numbers as you would with whole numbers, starting from the rightmost digit. Remember to carry over if necessary. 🧮 Example: Subtract 2.35 from 5. Rewrite 5 as 5.00. Align the decimals: $$ 5.00 \newline -2.35 \newline \overline{2.65} $$

Practice Quiz

1. What is 5.7 - 2.3?
1. 2.4
2. 3.4
3. 7.0
4. 8.0
2. Calculate 10.5 - 3.25.
1. 7.25
2. 6.75
3. 13.75
4. 7.30
3. Find the difference between 8.6 and 4.12.
1. 4.48
2. 12.72
3. 8.12
4. 4.00
4. What is 12.0 - 6.55?
1. 5.45
2. 6.55
3. 18.55
4. 5.00
5. Solve: 15.25 - 7.0
1. 8.25
2. 22.25
3. 7.00
4. 15.00
6. Compute 9.8 - 1.23.
1. 8.57
2. 11.03
3. 9.57
4. 7.23
7. Determine the result of 20.0 - 14.75.
1. 5.25
2. 34.75
3. 6.00
4. 6.75