Find Equivalent Expressions for 39×19: Multiplication Practice

Question

Which equation is the same as the following?

39×19 39\times19

Video Solution

Solution Steps

00:00 Find the expression representing the correct factorization of the exercise
00:03 Let's use the distributive law
00:06 Let's factor 39 into 40 minus 1
00:09 Let's factor 19 into 20 minus 1
00:12 And this is the solution to the question

Step-by-Step Solution

We solve each of the options and keep in mind the order of operations: calculation of the operation within parentheses, multiplication and division (from left to right), addition and subtraction (from left to right).

a.

(30×9)+(10×9)=270+90 (30×9)+(10×9)= 270+90

b.

(30+9)×(10×9)=39×90 (30+9)×(10×9)= 39×90

c.

(40−1)×(20−1)=39×19 (40-1)×(20-1)= 39×19

d.

(40−1)+(20×1)=39+20 (40-1)+(20×1)= 39+20

Therefore, the answer is option C.

Answer

(40−1)×(20−1) (40-1)\times(20-1)

More Questions

Related Subjects

The Distributive Property for Seventh Graders The Distributive Property The Distributive Property of Division The Distributive Property in the Case of Multiplication The commutative properties of addition and multiplication, and the distributive property

Question Types

The Distributive Property for 7th Grade: Introducing factorization