Question

Write the steps for how to use a number line to multiply a 2-digit number by 20. give an example

Answer 1

To obtain the multiplication of $2$ digits number by $20$ first jump two times the $2$ digit number then jump $10$ times by the result we get in step 1.

Further explanation:

A straight line that has all real numbers is known as number line.

The steps involve in multiplying 2-digit number by $20$ are as follows.

1. First multiply the two digit number by 2 and the get the result.

2. Multiply the result by $10$ to obtain the final result.

For example we have to multiply $15$ by $20$ on the number line.

Following are the steps involve in multiply $15$ by $20$ on the number line.

Step 1

Multiply 15 by 2 as,

$\begin{gathered}A = 15 \cdot 2 \\= 30 \\ \end{gathered}$

Make 2 jumps of 15 to get 30.

Step 2

Multiply $30$ to $10$ to obtain the final result.

$\begin{gathered}B = 30 \cdot 10 \\ = 300 \\ \end{gathered}$

Now make 10 jumps of 30 to get $300$.

To obtain the multiplication of 2 digits number by $20$ first jump two times the 2 digit number then jump $10$ times by the result we get in step 1.

Kindly refer to the image attached to the question.

Learn more:

1. Problem on multiplication brainly.com/question/573729

2. Problem on division brainly.com/question/545132

3. Problem on lines brainly.com/question/8554769

Answer details:

Grade: Junior school

Subject: Mathematics

Chapter: Number line

Keywords: two digit number, number line, twenty, multiply, add, jump, examples, multiplication.