I've been studying per-algebra on my own..
I've been told to use mountain multiplication,but, have never used that tool!
I don't know what it is either. My advice is to use the old multiplication tables. I assume you've memorized these.
I always thought that mountain multiplication resulted in large families. Be fruitful, and multiply.
Mountain multiplication Google it. It is music to help with memorization of the tables. Look for it on CD Baby.
Mountain multiplication, also known as lattice multiplication, is a visual method used to multiply two multi-digit numbers together. It is often taught in pre-algebra or elementary mathematics.
To understand how to use mountain multiplication, let's go through an example. Let's say we want to multiply 23 by 17.
1. Write the two numbers you want to multiply next to each other, leaving some space in between. In this case, write 23 and 17.
```
23
17
```
2. Draw a diagonal line starting from the bottom right corner and extend it to the top left corner, crossing the space between the numbers.
```
23
/ /
17
```
3. Divide the space between the numbers into smaller boxes using the diagonal line as a guide.
```
23
/ /
1 1
/ / /
2 6 3
```
4. Multiply the digits coming from the bottom right of each box and write the results inside the boxes.
```
23
/ /
1 1
/ / /
2 6 3
x x x
3 9
/ 1
3 4
```
5. Starting from the bottom-right box, add the numbers diagonally and carry over if necessary. Write the sum below the diagonal line.
```
23
/ /
1 1
/ / /
2 6 3
x x x
3 9
/ 1
3 4
+ 0
3 7
```
6. Write the final answer by concatenating all the numbers below the diagonal line.
```
23
/ /
1 1
/ / /
2 6 3
x x x
3 9
/ 1
3 4
+ 0
3 7 1
```
So, 23 multiplied by 17 equals 371.
I hope this explanation helps you use mountain multiplication to solve multiplication problems.