Real-world examples of multiplying numbers with zeros (Grade 5 math)

📚 Quick Study Guide

🔢 When multiplying by multiples of 10, 100, 1000, etc., simply multiply the non-zero digits and add the total number of zeros from both numbers to the end of the result. 💡 For example, to calculate $30 \times 200$, multiply $3 \times 2 = 6$, and then add the three zeros (one from 30 and two from 200) to get $6000$. ➕ The order of multiplication doesn't matter (commutative property): $a \times b = b \times a$. 📝 Remember to count ALL zeros in both numbers you are multiplying.

🔢 Practice Quiz

1. What is $40 \times 20$?
   1. 60
   2. 80
   3. 800
   4. 600
2. A school has 30 classrooms, and each classroom has 20 students. How many students are there in total?
   1. 50
   2. 60
   3. 600
   4. 500
3. Calculate: $12 \times 300$
   1. 36
   2. 360
   3. 3600
   4. 36000
4. A farmer sells 50 boxes of apples. Each box contains 10 apples. How many apples did the farmer sell?
   1. 50
   2. 60
   3. 500
   4. 5000
5. What is the product of $700 \times 6$?
   1. 42
   2. 420
   3. 4200
   4. 42000
6. A store sells 80 toys per day. How many toys does it sell in 10 days?
   1. 8
   2. 80
   3. 800
   4. 8000
7. Compute: $15 \times 2000$
   1. 30
   2. 300
   3. 3000
   4. 30000