In this activity, we will learn about the multiplication of two numbers.
Example
There are 3,136 horses. Each horse has 4 legs. How many legs are there altogether?
Answer:
Number of legs = 3,136 × 4
Step 1: Multiply the thousands by 4.
4 x 3,000 = 12.000
Step 2: Multiply the hundreds by 4.
4 x 100 = 400
Step 3: Multiply the tens by 4.
4 x 30 = 120
Step 4: Multiply the ones by 4.
4 x 6 = 24
Step 5: Add the answers altogether.
12,000 + 400 + 120 + 24 = 12,544
× | 3 | 1 | 3 | 6 | ||
4 | ||||||
4 × 3000 | 1 | 2 | 0 | 0 | 0 | |
4 × 100 | 4 | 0 | 0 | |||
4 × 30 | 1 | 2 | 0 | |||
4 × 6 | 2 | 4 | ||||
1 | 2 | 5 | 4 | 4 |
So there are 12,544 legs altogether.
That's a lot of legs!
Let's have a go at some questions now.