Grade 5 Math Test Prep: Divide Decimals by Powers of Ten

📚 Quick Study Guide

• 🔢 When you divide a decimal by a power of ten (like 10, 100, 1000), you move the decimal point to the left.
• 🔍 The number of places you move the decimal point is equal to the number of zeros in the power of ten.
• 📝 Dividing by 10: Move the decimal point one place to the left. Example: $4.5 \div 10 = 0.45$
• 💡 Dividing by 100: Move the decimal point two places to the left. Example: $4.5 \div 100 = 0.045$
• 🧮 Dividing by 1000: Move the decimal point three places to the left. Example: $4.5 \div 1000 = 0.0045$
• 📌 If you run out of digits to the left of the decimal point, add zeros as placeholders.
• ➕ Remember, dividing by a power of ten makes the number smaller!

🧪 Practice Quiz

1. What is $12.5 \div 10$?
1. 125
2. 1.25
3. 0.125
4. 1250
2. What is $1.6 \div 100$?
1. 0.16
2. 0.016
3. 160
4. 16
3. What is $235.8 \div 1000$?
1. 23.58
2. 2.358
3. 0.2358
4. 0.02358
4. What is $0.9 \div 10$?
1. 9
2. 0.9
3. 0.09
4. 90
5. Calculate: $45.67 \div 100$
1. 4567
2. 4.567
3. 0.4567
4. 456.7
6. Solve: $100.0 \div 1000$
1. 100000
2. 100
3. 10
4. 0.1
7. Find the value of: $0.05 \div 10$
1. 0.5
2. 0.05
3. 0.005
4. 5