The Power of Tenths and Hundredths
Multiplying by 0.1 or 0.01 is like having a shrinking machine for numbers!
When you multiply a number by 0.1, you're making it 10 times smaller (which is the same as dividing by 10).
Multiplying by 0.01 makes it 100 times smaller (like dividing by 100). It's a super useful skill for working with money, measurements, and more!
How It Works
1️⃣ Multiplying by 0.1 moves the decimal point one place to the left
2️⃣ Multiplying by 0.01 moves the decimal point two places to the left
3️⃣ Add zeros if needed when moving past existing digits
Let's Practice Together!
Money Example
If you have 45 dollars and you multiply it by 0.1, how much money do you have now?
Click to reveal answer
45 × 0.1 = 4.5
The decimal moves one place left: 45 → 4.5
You now have $4.50 - that's 45 dollars made 10 times smaller!
Measurement Example
A dinosaur bone is 325 cm long. What is 0.01 of its length?
Click to reveal answer
325 × 0.01 = 3.25
The decimal moves two places left: 325 → 3.25
The answer is 3.25 cm - that's 100 times smaller than the original bone!
Fun fact: This is like converting centimeters to meters!
Parent Tips 🌟
- Real-world connections: Show how this works with money (dollars to dimes to pennies) to make it concrete.
- Movement matters: Have your child physically move decimal points on paper to visualize the change.
- Game challenge: Make a "decimal point race" where you call out numbers and they shout the answer after multiplying by 0.1 or 0.01.