How can you use multiplication facts for 1 and 2 to find 3x7 ?
To use multiplication facts for 1 and 2 to find the product of 3x7, you can break it down into smaller, easier-to-calculate parts. Here's how you can do it:
Step 1: Find the product of 3x6.
Since you already know the multiplication facts for 1 and 2, it is easy to calculate this. You can simply add 3 to itself six times, or use the fact that multiplying any number by 6 is the same as multiplying it by 2 and then by 3. So, 3x6 equals 18.
Step 2: Add the product of 3x6 to 3.
Now that you know the product of 3x6 is 18, you can add 18 to 3. Simply add the individual digits together: 18 + 3 = 21.
Therefore, 3x7 equals 21.
By using the multiplication facts for 1 and 2, you were able to calculate 3x7.