# Use the commutative law of multiplication to write an equivalent expression

Remember, this property does not apply to subtraction or division, just like the commutative property. Yes, but remember - the commutative property only works for multiplication and addition.

What are you suggesting? Remind students that the Associative Property moves the parentheses but does not change the position of the numbers. Yes, and we often use parentheses to show those groups. It is true that in algebra, when we write quantities right next to each other without any symbol in between, multiplication is implied.

I already drew a picture to show what that might look like. Why do you have to write any symbol at all? Changes additions to multiplications. Why is that less confusing to you? I have an idea. In mathematics we have a property that says that when you multiply, the order of the factors does not matter.

You could add all the x s together and add all the 1 s together. Vignette In the Classroom In this vignette, students use associative, commutative, and distributive properties to generate equivalent algebraic expressions for the area of a rectangle.

I know an easier way to do the problem. But back to our original task of generating equivalent expressions for the area of the rectangle. Instructional Implications Explain what it means for expressions to be equivalent i. Remind students that calculations are always done left to right, and that groups must follow the rules working from innermost to outer.

To prove two expressions are equivalent, properties and theorems must be used. Because we usually write the numbers first. How do you suggest we write the expression? Well, I remember that the fastest way to find the area of a rectangle is to multiply the length by the width.

This provides an opportunity to show that the properties actually do act the same way with numbers and algebraic expressions. But why does the distributive property work?

Also, provide an example of two expressions that are not equivalent [e. Show me what you mean. What part is confusing you?

Are the two expressions equivalent? The associative property is about grouping. I know that properties are somewhat like laws; they always work. Is there another way to write that expression that may be a little simpler? Because the coefficient 1 is implied, students will benefit from the teacher writing the coefficient 1 whenever it is implied to make it explicit.

Is 3x equivalent to x3?

Do you know what the Associative Property states?The commutative property of multiplication states that you can multiply numbers in any order. In English to commute means to travel or to change location. In math, the commutative property of multiplication allows us to change the places of factors in a product.

Use the communative law of multiplication to write an equivalent expression. x+3y Math prove that the cancellation law of multiplication is equivalent in a commutative ring to the assertion that the product of non-zero factors is not zero.

Mar 31,  · Use the commutative law of multiplication to write an equivalent expression. a(x + 1)? More questions Use the commutative law of multiplication to write an equivalent expression for this problem: a(x + 1)?Status: Resolved. Commutative law of multiplication. Intro to commutative property of multiplication.

Use the commutative law of addition-- let me underline that-- the commutative law of addition to write the expression 5 plus 8 plus 5 in a different way and then find the sum.

Now, this commutative law of addition sounds like a very fancy thing, but all it. Question use the commutative property of addition to write an equivalent expression to 7x+8y. use the associative property of addition to write an equivalent expression to 3x+(5y+6) use the commutative property of multiplication to write an equivalent expression to (3a)(4b).

In this vignette, students use associative, commutative, and distributive properties to generate equivalent algebraic expressions for the area of a rectangle. Teacher: Today's task is to generate as many expressions as you can to represent the area of this rectangle.

Use the commutative law of multiplication to write an equivalent expression
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