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Course: 4th grade > Unit 3
Lesson 1: Comparing with multiplication- Multiply by 1-digit numbers: FAQ
- Comparing with multiplication
- Comparing with multiplication and addition: giraffe
- Comparing with multiplication and addition: money
- Comparing with multiplication: magic
- Compare with multiplication
- Compare with multiplication word problems
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Multiply by 1-digit numbers: FAQ
Frequently asked questions about multiplying by 1-digit numbers.
How can we use the distributive property to multiply larger numbers?
The distributive property is a rule in math that lets us break apart a multiplication problem into smaller parts to make it easier to multiply.
For example, if we want to multiply , we can break down into , and then use the distributive property to multiply each part by :
Try it yourself with these exercises:
How can we use area models to multiply larger numbers?
Similar to the distributive property, we can use area models to make multiplication easier. An area model is a way of visualizing a multiplication problem by drawing a rectangle and dividing it into sections. It can help us understand how different parts of the problem work together.
The following area model shows broken into parts.
The image is not drawn to scale.
The image is not drawn to scale.
Try it yourself with these exercises:
Why do we need to learn how to estimate products?
Estimating products can help us check our work and get a rough idea of what the answer might be before we start multiplying.
Practice estimating products with this exercise:
Why is it important to learn different ways to multiply 1-digit by 2-, 3-, and 4- digit numbers?
Different methods may work better for different people, so learning multiple methods can help you find the one that works best for you. Understanding more than one way to solve a problem can deepen one's understanding of the mathematical concepts involved, as opposed to just memorizing one procedure.
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- So, if we had 124x3, what would happen?(21 votes)
- We could break up 124 into 100+20+4.
Then 124x3 = 300+60+12 = 372.
The answer is 372.
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- also I have a question for you what is a square root.(3 votes)
- The square root of a number is a number that when multiplied by itself gives the actual number. For example, 2 is the square root of 4, and this is expressed as √4 = 2. This means when 2 is multiplied by 2 it results in 4 and this can be verified as 2 × 2 = 4. So the square root of 30 is 900.(2 votes)
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