Question

Which basic fact can be used to find 3* 800 ?

A. 3* 8=24
B. 2* 8=16
C. 5* 8=40
D. 10* 8=80

Answer 1

To find 3 \* 800, use the basic multiplication fact 3 \* 8 = 24 and then multiply by 100 to get 2400.

Step-by-step explanation:

To find 3 \* 800 using a basic fact, we look for a multiplication fact that includes a 3 and an 8 and results in a product we can easily multiply by 100. Among the options provided, A. 3* 8=24 is the useful basic fact because we can use it to find 3 \* 800 by simply appending two zeroes to the product of 3 and 8. The steps would be:

1. Identify the basic multiplication fact: 3 \* 8 = 24.
2. Since we need to find 3 \* 800, we multiply 24 by 100 (because 800 is 100 times larger than 8).
3. 24 \* 100 = 2400, so 3 \* 800 equals 2400.

By using this basic multiplication fact along with an understanding of place value, we can easily find the product of 3 \* 800.