๐ Understanding Multiplication by 2, 5, and 10
Multiplication is a way of adding the same number multiple times. Multiplying by 2, 5, and 10 are some of the easiest and most common types of multiplication we use every day. Let's explore them!
๐ข Multiplication by 2: Doubling Up
Multiplying by 2 is like doubling something. It's the same as adding the number to itself. Think of it as having two of something.
- ๐ Scenario: You have 3 apples, and your friend gives you the same amount. How many apples do you have in total? $3 \times 2 = 6$ apples.
- ๐ช Baking: A recipe calls for 1 cup of flour, but you want to double the recipe. You need $1 \times 2 = 2$ cups of flour.
- ๐ Pairs: You have 7 pairs of socks. How many socks do you have in total? $7 \times 2 = 14$ socks.
๐๏ธ Multiplication by 5: Counting on Your Fingers
Multiplying by 5 is like counting by fives. It's useful when dealing with things that come in groups of five.
- ๐ช Nickels: You have 4 nickels. How much money do you have in cents? Each nickel is worth 5 cents, so $4 \times 5 = 20$ cents.
- โญ Star Stickers: You get 6 sheets of star stickers, and each sheet has 5 stars. How many stars do you have in total? $6 \times 5 = 30$ stars.
- โ Hands: If 3 people raise one hand, how many fingers are in the air? $3 \times 5 = 15$ fingers.
๐ Multiplication by 10: Adding a Zero
Multiplying by 10 is the easiest! You simply add a zero to the end of the number you're multiplying.
- โ๏ธ Pencils: You have 8 packs of pencils, and each pack contains 10 pencils. How many pencils do you have? $8 \times 10 = 80$ pencils.
- ๐ฌ Pieces of Candy: You buy 5 bags of candy, with each bag holding 10 pieces. How many pieces of candy do you have? $5 \times 10 = 50$ pieces of candy.
- ๐ต Dollars: You saved 12 ten-dollar bills. How much money do you have? $12 \times 10 = 120$ dollars.
๐ Practice Quiz
Test your knowledge with these multiplication problems:
- A spider has 8 legs. How many legs do 2 spiders have?
- You have 7 boxes of crayons, and each box contains 5 crayons. How many crayons do you have in all?
- There are 9 cars in a parking lot. Each car has 10 lug nuts. How many lug nuts are there in total?
Answers: 1. 16, 2. 35, 3. 90
๐ก Conclusion
Multiplying by 2, 5, and 10 are fundamental skills that make everyday calculations much easier! Keep practicing, and you'll become a multiplication master in no time!