Question

Explain how using basic facts can help you find 10*20*30*40 mentally.

Answer 1

240000 will be the answer.

Further explanation:

The following steps can help to calculate the given product mentally.

Given: 10*20*30*40

Step 1:

As we can see that there are zeroes with each number so we will count the total number of zeroes that is 4. So there will be four zeroes in the answer.

Step 2:

Now we multiply the numbers excluding the zeroes

i.e. 1*2*3*4

The product is 24.

Step 3:

The zeroes will be written to the right of the product of numbers.

i.e. 240000

Hence, the given steps will help us to find the product mentally.

Keywords: Product, oral product

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