I have a problem find the number in a open number line , my multiplication is 28x6 =168 how can I do this in a open number line ?
http://www.homeschoolmath.net/teaching/md/multiplication-number-line.php
And what happen if the number is 247 x 34 =8398
I wouldn't use a number line. I'd learn how to multiply the long way or use a calculator.
To solve multiplication problems on an open number line, you can break down the multiplication into a series of additions or jumps. Here's how you can solve 28 x 6 = 168 on an open number line:
1. Start by drawing a horizontal line and labeling the numbers on the line. Place 0 at the beginning, and choose a suitable scale (e.g., by increments of 10 or 20).
0 10 20 30 ... 100 ... 160 170 180
2. Now, locate the starting number, which is 28, on the number line. Mark it as a reference point.
0 10 20 30 ... 100 ... 160 (28) 170 180
3. Next, you need to make 6 jumps of 28. Start from 28 and add 28 repeatedly.
- First jump: Add 28 to 28. This gives you 56.
- Second jump: Add another 28 to 56. This gives you 84.
- Third jump: Add 28 to 84. This gives you 112.
- Fourth jump: Add 28 to 112. This gives you 140.
- Fifth jump: Add 28 to 140. This gives you 168.
- Sixth jump: Add the final 28 to 168. This would exceed 180, so you stop at 168.
0 10 20 30 ... 100 ... 160 (28) 170 180
| |
|------|------|------|------|
56 84 112 140 168
4. You have made six jumps, and the final position on the number line is 168. Therefore, 28 x 6 = 168.
Using this method on an open number line can help visualize the multiplication process and understand the concept of repeated addition.